diff --git a/models/106.session b/models/106.session
new file mode 100644
index 0000000..ea4a0fe
--- /dev/null
+++ b/models/106.session
@@ -0,0 +1,23 @@
+window_sizes 1800 910 367 1428 760 104
+
+diagrams
+  sequencediagram_ref 141236 // use_case_2_2
+    1172 693 100 A4 0 0
+  classdiagram_ref 128180 // domain_model
+    1172 693 100 A2 72 44
+  sequencediagram_ref 134634 // use_case_3_1
+    114 86 100 A4 0 0
+  sequencediagram_ref 134762 // use_case_3_2
+    114 86 100 A4 0 0
+  sequencediagram_ref 134890 // use_case_3_3
+    114 86 100 A4 0 0
+  active  sequencediagram_ref 128269 // use_case_6_3
+    1428 760 100 A4 0 0
+end
+show_stereotypes
+selected sequencediagram_ref 128269 // use_case_6_3
+open
+  classview_ref 128180 // domain
+  classview_ref 134708 // design
+end
+end
diff --git a/models/128013_106.d b/models/128013_106.d
deleted file mode 100644
index 4333e27..0000000
--- a/models/128013_106.d
+++ /dev/null
@@ -1,69 +0,0 @@
-format 224
-
-classinstancecanvas 128013 classinstance_ref 128013 // 
-  xyz 35 17 2005 life_line_z 2000
-end
-classinstance 128909 class_ref 150708 // Kwota
-  name "controller"   xyz 222 15 2005 life_line_z 2000
-classinstance 129549 class_ref 143028 // Automat
-  name ""   xyz 469 17 2010 life_line_z 2000
-classinstance 129933 class_ref 135476 // Platnosc
-  name ""   xyz 732 22 2005 life_line_z 2000
-classinstancecanvas 130445 classinstance_ref 128397 // 
-  xyz 585 15 2005 life_line_z 2000
-end
-durationcanvas 129165 classinstance_ref 128013 // :Klient
-  xyzwh 54 84 2010 11 45
-end
-durationcanvas 129293 classinstance_ref 128909 // controller:Kwota
-  xyzwh 262 76 2010 11 291
-end
-durationcanvas 129677 classinstance_ref 129549 // :Automat
-  xyzwh 491 122 2010 11 59
-end
-durationcanvas 130189 classinstance_ref 129933 // :Platnosc
-  xyzwh 754 298 2010 11 66
-end
-durationcanvas 131213 classinstance_ref 130445 // :Sprzedaz
-  xyzwh 610 189 2010 11 62
-end
-durationcanvas 131469 classinstance_ref 129933 // :Platnosc
-  xyzwh 754 181 2010 11 83
-end
-msg 129421 synchronous
-  from durationcanvas_ref 129165
-  to durationcanvas_ref 129293
-  yz 84 2015 explicitmsg "AddCash(int amount)"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 111 68
-msg 129805 synchronous
-  from durationcanvas_ref 129293
-  to durationcanvas_ref 129677
-  yz 122 2015 explicitmsg "CheckCash()"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 308 106
-msg 130061 return
-  from durationcanvas_ref 129677
-  to durationcanvas_ref 129293
-  yz 166 2015 explicitmsg "isCorrect"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 313 150
-msg 130317 synchronous
-  from durationcanvas_ref 129293
-  to durationcanvas_ref 130189
-  yz 350 2015 explicitmsg "AddCash(int amount)"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 323 334
-msg 131341 synchronous
-  from durationcanvas_ref 129293
-  to durationcanvas_ref 131213
-  yz 204 3005 explicitmsg "CreatePayment()"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 388 188
-msg 131597 synchronous
-  from durationcanvas_ref 131213
-  to durationcanvas_ref 131469
-  yz 240 2015 explicitmsg "CreatePayment()"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 645 224
-end
diff --git a/models/128141_106.d b/models/128141_106.d
deleted file mode 100644
index c8d2a4a..0000000
--- a/models/128141_106.d
+++ /dev/null
@@ -1,54 +0,0 @@
-format 224
-
-classinstancecanvas 128013 classinstance_ref 128013 // 
-  xyz 35 17 2005 life_line_z 2000
-end
-classinstance 128909 class_ref 150708 // Kwota
-  name "controller"   xyz 242 17 2005 life_line_z 2000
-classinstance 129549 class_ref 143028 // Automat
-  name ""   xyz 430 17 2010 life_line_z 2000
-classinstance 129933 class_ref 135476 // Platnosc
-  name ""   xyz 694 20 2005 life_line_z 2000
-classinstancecanvas 130573 classinstance_ref 128525 // 
-  xyz 564 21 2015 life_line_z 2000
-end
-durationcanvas 129165 classinstance_ref 128013 // :Klient
-  xyzwh 54 87 2010 11 42
-end
-durationcanvas 129293 classinstance_ref 128909 // controller:Kwota
-  xyzwh 282 87 2010 11 168
-end
-durationcanvas 129677 classinstance_ref 129549 // :Automat
-  xyzwh 452 125 2010 11 56
-end
-durationcanvas 130701 classinstance_ref 130573 // :Sprzedaz
-  xyzwh 589 228 2010 11 25
-end
-durationcanvas 130957 classinstance_ref 129933 // :Platnosc
-  xyzwh 716 238 2010 11 25
-end
-msg 129421 synchronous
-  from durationcanvas_ref 129165
-  to durationcanvas_ref 129293
-  yz 87 2015 explicitmsg "CancelPayment()"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 111 71
-msg 129805 synchronous
-  from durationcanvas_ref 129293
-  to durationcanvas_ref 129677
-  yz 125 2015 explicitmsg "ReturnMoney()"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 328 109
-msg 130829 synchronous
-  from durationcanvas_ref 129293
-  to durationcanvas_ref 130701
-  yz 228 2015 explicitmsg "CancelPayment()"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 397 212
-msg 131085 synchronous
-  from durationcanvas_ref 130701
-  to durationcanvas_ref 130957
-  yz 238 2020 explicitmsg "DeletePayment()"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 615 222
-end
diff --git a/models/128180.diagram b/models/128180.diagram
index 03eb100..e612f5f 100644
--- a/models/128180.diagram
+++ b/models/128180.diagram
@@ -1,4 +1,4 @@
-format 223
+format 224
 
 classcanvas 128052 class_ref 134580 // Serwisant
   classdiagramsettings member_max_width 0 end
@@ -136,22 +136,22 @@ relationcanvas 130996 relation_ref 128820 // < wysyla
   multiplicity_a_pos 107 203 3000 multiplicity_b_pos 106 214 3000
 end
 relationcanvas 131380 relation_ref 129076 // odpowiada za
-  from ref 128180 z 2001 label "odpowiada za" italic max_width 255 xyz 237.5 182.5 2001 to ref 131124
+  from ref 128180 z 2001 label "odpowiada za" italic max_width 255 xyz 237 182 2001 to ref 131124
   no_role_a no_role_b
   multiplicity_a_pos 347 220 3000 multiplicity_b_pos 238 186 3000
 end
 relationcanvas 131892 relation_ref 129588 // przechowuje >
-  from ref 128692 z 2001 label "przechowuje >" italic max_width 255 xyz 697 219.5 2001 to ref 131124
+  from ref 128692 z 2001 label "przechowuje >" italic max_width 255 xyz 697 219 2001 to ref 131124
   no_role_a no_role_b
   multiplicity_a_pos 474 232 3000 multiplicity_b_pos 998 255 3000
 end
 relationcanvas 132020 relation_ref 129716 // magazynuje >
-  from ref 128436 z 2001 label "magazynuje >" italic max_width 255 xyz 1106 160.5 2001 to ref 128692
+  from ref 128436 z 2001 label "magazynuje >" italic max_width 255 xyz 1106 160 2001 to ref 128692
   no_role_a no_role_b
   multiplicity_a_pos 1089 186 3000 multiplicity_b_pos 1093 145 3000
 end
 relationcanvas 132148 relation_ref 129844 // < zaopatruje
-  from ref 128564 z 2001 label "< zaopatruje" italic max_width 255 xyz 917 101.5 2001 to ref 128436
+  from ref 128564 z 2001 label "< zaopatruje" italic max_width 255 xyz 917 101 2001 to ref 128436
   no_role_a no_role_b
   multiplicity_a_pos 1053 125 3000 multiplicity_b_pos 849 128 3000
 end
@@ -168,7 +168,7 @@ relationcanvas 133044 relation_ref 130356 // uczestniczy >
 end
 relationcanvas 133172 relation_ref 130484 // dokonuje
   decenter_begin 493
-  from ref 132788 z 2001 label "dokonuje" italic max_width 255 xyz 646.5 440 2001 to ref 131124
+  from ref 132788 z 2001 label "dokonuje" italic max_width 255 xyz 646 440 2001 to ref 131124
   no_role_a no_role_b
   multiplicity_a_pos 438 266 3000 multiplicity_b_pos 644 466 3000
 end
@@ -178,7 +178,7 @@ relationcanvas 133300 relation_ref 130612 // oplacona
   multiplicity_a_pos 653 548 3000 multiplicity_b_pos 656 599 3000
 end
 relationcanvas 133812 relation_ref 130868 // przeprowadza
-  from ref 128052 z 2001 label "przeprowadza" italic max_width 255 xyz 36 407.5 2001 to ref 132660
+  from ref 128052 z 2001 label "przeprowadza" italic max_width 255 xyz 36 407 2001 to ref 132660
   no_role_a no_role_b
   multiplicity_a_pos 106 470 3000 multiplicity_b_pos 106 350 3000
 end
@@ -188,32 +188,32 @@ relationcanvas 133940 relation_ref 130996 // < przechodzi
   multiplicity_a_pos 355 266 3000 multiplicity_b_pos 146 470 3000
 end
 relationcanvas 134452 relation_ref 131252 // obsluguje  >
-  from ref 131124 z 2001 label "obsluguje  >" italic max_width 255 xyz 334.5 89.5 2001 to ref 129588
+  from ref 131124 z 2001 label "obsluguje  >" italic max_width 255 xyz 334 89 2001 to ref 129588
   no_role_a no_role_b
   multiplicity_a_pos 395 70 3000 multiplicity_b_pos 397 166 3000
 end
 relationcanvas 134580 relation_ref 131380 // powiadamia >
-  from ref 129588 z 2001 label "powiadamia >" italic max_width 255 xyz 600.5 64 2001 to ref 128564
+  from ref 129588 z 2001 label "powiadamia >" italic max_width 255 xyz 600 64 2001 to ref 128564
   no_role_a no_role_b
   multiplicity_a_pos 744 123 3000 multiplicity_b_pos 488 65 3000
 end
 relationcanvas 135220 relation_ref 131636 // < uzupelnia
-  from ref 132404 z 2001 label "< uzupelnia" italic max_width 255 xyz 499 158.5 2001 to ref 131124
+  from ref 132404 z 2001 label "< uzupelnia" italic max_width 255 xyz 499 158 2001 to ref 131124
   no_role_a no_role_b
   multiplicity_a_pos 474 190 3000 multiplicity_b_pos 516 147 3000
 end
 relationcanvas 135476 relation_ref 131892 // obejmuje >
-  from ref 132788 z 2001 label "obejmuje >" italic max_width 255 xyz 783 380.5 2001 to ref 128692
+  from ref 132788 z 2001 label "obejmuje >" italic max_width 255 xyz 783 380 2001 to ref 128692
   role_a_pos 1011 269 3000 role_b_pos 718 462 3000
   no_multiplicity_a no_multiplicity_b
 end
 relationcanvas 135604 relation_ref 132020 // < kontroluje
-  from ref 132788 z 2001 label "< kontroluje" italic max_width 255 xyz 769.5 499 2001 to ref 129716
+  from ref 132788 z 2001 label "< kontroluje" italic max_width 255 xyz 769 499 2001 to ref 129716
   no_role_a no_role_b
   multiplicity_a_pos 886 524 3000 multiplicity_b_pos 718 522 3000
 end
 relationcanvas 135732 relation_ref 132148 // < zaksiegowuje
-  from ref 132788 z 2001 label "< zaksiegowuje" italic max_width 255 xyz 824 560.5 2001 to ref 129844
+  from ref 132788 z 2001 label "< zaksiegowuje" italic max_width 255 xyz 824 560 2001 to ref 129844
   no_role_a no_role_b
   multiplicity_a_pos 923 626 3000 multiplicity_b_pos 718 539 3000
 end
@@ -234,12 +234,12 @@ relationcanvas 136116 relation_ref 132532 // dotyczy >
 end
 relationcanvas 136244 relation_ref 132660 // sklada
   decenter_begin 388
-  from ref 129460 z 2001 label "sklada" italic max_width 255 xyz 388.5 513 2001 to ref 129332
+  from ref 129460 z 2001 label "sklada" italic max_width 255 xyz 388 513 2001 to ref 129332
   no_role_a no_role_b
   multiplicity_a_pos 418 489 3000 multiplicity_b_pos 416 551 3000
 end
 relationcanvas 137396 relation_ref 139188 // <dotyczy
-  from ref 129076 z 2001 label "<dotyczy" italic max_width 255 xyz 910 754.5 3000 to ref 137268
+  from ref 129076 z 2001 label "<dotyczy" italic max_width 255 xyz 910 754 2001 to ref 137268
   no_role_a no_role_b
   multiplicity_a_pos 979 780 3000 multiplicity_b_pos 885 777 3000
 end
diff --git a/models/128269_106.d b/models/128269_106.d
deleted file mode 100644
index 8c1567d..0000000
--- a/models/128269_106.d
+++ /dev/null
@@ -1,54 +0,0 @@
-format 224
-
-classinstancecanvas 128013 classinstance_ref 128013 // 
-  xyz 35 17 2005 life_line_z 2000
-end
-classinstance 128909 class_ref 150708 // Kwota
-  name "controller"   xyz 242 17 2005 life_line_z 2000
-classinstance 129549 class_ref 143028 // Automat
-  name ""   xyz 430 17 2010 life_line_z 2000
-classinstance 129933 class_ref 135476 // Platnosc
-  name ""   xyz 694 20 2005 life_line_z 2000
-classinstancecanvas 130573 classinstance_ref 128525 // 
-  xyz 564 21 2015 life_line_z 2000
-end
-durationcanvas 129165 classinstance_ref 128013 // :Klient
-  xyzwh 54 87 2010 11 42
-end
-durationcanvas 129293 classinstance_ref 128909 // controller:Kwota
-  xyzwh 282 87 2010 11 168
-end
-durationcanvas 129677 classinstance_ref 129549 // :Automat
-  xyzwh 452 125 2010 11 56
-end
-durationcanvas 130701 classinstance_ref 130573 // :Sprzedaz
-  xyzwh 589 228 2010 11 25
-end
-durationcanvas 130957 classinstance_ref 129933 // :Platnosc
-  xyzwh 716 238 2010 11 25
-end
-msg 129421 synchronous
-  from durationcanvas_ref 129165
-  to durationcanvas_ref 129293
-  yz 87 2015 explicitmsg "ChangePayment()"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 111 71
-msg 129805 synchronous
-  from durationcanvas_ref 129293
-  to durationcanvas_ref 129677
-  yz 125 2015 explicitmsg "ReturnMoney()"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 328 109
-msg 130829 synchronous
-  from durationcanvas_ref 129293
-  to durationcanvas_ref 130701
-  yz 228 2015 explicitmsg "CancelPayment()"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 397 212
-msg 131085 synchronous
-  from durationcanvas_ref 130701
-  to durationcanvas_ref 130957
-  yz 238 2020 explicitmsg "DeletePayment()"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 615 222
-end
diff --git a/models/134634_106.d b/models/134634.diagram
similarity index 92%
rename from models/134634_106.d
rename to models/134634.diagram
index d92a70c..b2bf9f6 100644
--- a/models/134634_106.d
+++ b/models/134634.diagram
@@ -6,6 +6,8 @@ classinstance 128234 class_ref 143028 // Automat
   name ""   xyz 328 54 2000 life_line_z 2000
 classinstance 129258 class_ref 143412 // Sprzedaz
   name "aktualnaSprzedaz"   xyz 680 125 2000 life_line_z 2000
+note 130026 "wybranie produktu"
+  xyzwh 159 12 2000 115 55
 durationcanvas 128362 classinstance_ref 128106 // :Klient
   xyzwh 87 98 2010 11 58
 end
@@ -21,7 +23,7 @@ end
 msg 128618 synchronous
   from durationcanvas_ref 128362
   to durationcanvas_ref 128490
-  yz 122 2015 explicitmsg "potwierdzenieWyboruProduktu(nrProduktu)"
+  yz 122 2015 explicitmsg "podanieNrProduktu(nrProduktu)"
   show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
   label_xy 138 108
 reflexivemsg 128874 synchronous
diff --git a/models/134708_106.d b/models/134708_106.d
deleted file mode 100644
index 9af944e..0000000
--- a/models/134708_106.d
+++ /dev/null
@@ -1,29 +0,0 @@
-format 224
-
-classinstancecanvas 128052 classinstance_ref 128052 // 
-  xyz 65 4 2005 life_line_z 2000
-end
-classinstancecanvas 128180 classinstance_ref 128180 // automat
-  xyz 235 4 2005 life_line_z 2000
-end
-durationcanvas 128308 classinstance_ref 128052 // :Serwisant
-  xyzwh 92 81 2010 11 40
-end
-durationcanvas 128436 classinstance_ref 128180 // automat:Automat
-  xyzwh 276 81 2010 11 25
-end
-durationcanvas 129204 classinstance_ref 128180 // automat:Automat
-  xyzwh 276 140 2010 11 40
-end
-msg 128564 synchronous
-  from durationcanvas_ref 128308
-  to durationcanvas_ref 128436
-  yz 81 2015 explicitmsg "Zmien_tryb(code)"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 126 66
-reflexivemsg 129332 synchronous
-  to durationcanvas_ref 129204
-  yz 140 2015 explicitmsg "Tryb_serwisowy(isActive)"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 318 137
-end
diff --git a/models/134762.diagram b/models/134762.diagram
new file mode 100644
index 0000000..0a2b242
--- /dev/null
+++ b/models/134762.diagram
@@ -0,0 +1,32 @@
+format 224
+
+classinstance 128106 class_ref 135860 // Klient
+  name ""   xyz 76 15 2000 life_line_z 2000
+classinstance 128234 class_ref 143028 // Automat
+  name ""   xyz 332 15 2000 life_line_z 2000
+classinstance 128746 class_ref 143412 // Sprzedaz
+  name "aktualnaSprzedaz"   xyz 487 15 2000 life_line_z 2000
+durationcanvas 128362 classinstance_ref 128106 // :Klient
+  xyzwh 95 88 2010 11 40
+end
+durationcanvas 128490 classinstance_ref 128234 // :Automat
+  xyzwh 354 88 2010 11 25
+end
+durationcanvas 128874 classinstance_ref 128746 // aktualnaSprzedaz:Sprzedaz
+  xyzwh 555 103 2010 11 25
+end
+msg 128618 synchronous
+  from durationcanvas_ref 128362
+  to durationcanvas_ref 128490
+  yz 88 2015 explicitmsg "wybranieMetodyPlatnosci()"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  args "metoda"
+  label_xy 147 74
+msg 129002 synchronous
+  from durationcanvas_ref 128490
+  to durationcanvas_ref 128874
+  yz 103 2020 explicitmsg "setMetodaPlatnosci()"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  args "metoda"
+  label_xy 392 89
+end
diff --git a/models/134890.diagram b/models/134890.diagram
new file mode 100644
index 0000000..65d5cc9
--- /dev/null
+++ b/models/134890.diagram
@@ -0,0 +1,29 @@
+format 224
+
+classinstance 128106 class_ref 135860 // Klient
+  name ""   xyz 81 4 2000 life_line_z 2000
+classinstance 128234 class_ref 143028 // Automat
+  name ""   xyz 349 4 2000 life_line_z 2000
+durationcanvas 128362 classinstance_ref 128106 // :Klient
+  xyzwh 100 66 2010 11 40
+end
+durationcanvas 128490 classinstance_ref 128234 // :Automat
+  xyzwh 371 66 2010 11 38
+  overlappingdurationcanvas 128746
+    xyzwh 377 73 2020 11 25
+  end
+end
+msg 128618 synchronous
+  from durationcanvas_ref 128362
+  to durationcanvas_ref 128490
+  yz 66 2015 explicitmsg "potwierdzenieWyboruProduktu()"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  args "potwierdzenie"
+  label_xy 130 50
+reflexivemsg 128874 synchronous
+  to durationcanvas_ref 128746
+  yz 73 2025 explicitmsg "potwierdzenieWyboruProduktu()"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  args "potwierdzenie"
+  label_xy 410 51
+end
diff --git a/models/135018_106.d b/models/135018.diagram
similarity index 100%
rename from models/135018_106.d
rename to models/135018.diagram
diff --git a/models/models.prj b/models/models.prj
index 6670447..ce4fff4 100644
--- a/models/models.prj
+++ b/models/models.prj
@@ -1,7 +1,7 @@
 format 224
 "models"
-  revision 10
-  modified_by 13 "Arek"
+  revision 11
+  modified_by 106 "Lucasó"
 
 
   
@@ -1344,5 +1344,37 @@ format 224
       sequencediagramsettings end
       overlapping_bars size A4
     end
+
+    sequencediagram 134634 "use_case_3_1"
+      sequencediagramsettings end
+      overlapping_bars size A4
+    end
+
+    sequencediagram 134762 "use_case_3_2"
+      sequencediagramsettings end
+      overlapping_bars size A4
+    end
+
+    sequencediagram 134890 "use_case_3_3"
+      sequencediagramsettings end
+      overlapping_bars size A4
+    end
+
+    sequencediagram 135018 "use_case_3_4"
+      sequencediagramsettings end
+      overlapping_bars size A4
+    end
+
+    class 134634 "Bank"
+      visibility package 
+      cpp_decl ""
+      java_decl ""
+      php_decl ""
+      python_2_2 python_decl ""
+      idl_decl ""
+      explicit_switch_type ""
+      mysql_decl ""
+      
+    end
   end
 end