diff --git a/02.ipynb b/02.ipynb
index 09bf967..8de3430 100644
--- a/02.ipynb
+++ b/02.ipynb
@@ -2158,6 +2158,13 @@
     "\n",
     "<img src=\"figs/Lab2_4.png\" width=\"600\">"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {