diff --git a/labs/10-graphs-exercises.ipynb b/labs/10-graphs-exercises.ipynb
index 61a1428e4d896e583813403ed9a32e8efcf61afc..1a02600f793d72680b35fd3cadb368dfc7b041d1 100644
--- a/labs/10-graphs-exercises.ipynb
+++ b/labs/10-graphs-exercises.ipynb
@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "id": "53c1dc9b",
+   "id": "73af87e2",
    "metadata": {},
    "source": [
     "NAME:"
@@ -63,7 +63,20 @@
     "1. Draw the graph using a node-link diagram\n",
     "2. Does it have a cycle?\n",
     "3. Is it connected? If not, how many components?\n",
-    "4. Does it have a self loop?"
+    "4. Does it have a self loop?\n",
+    "5. What is the matrix representation?"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "4931afb4-c133-45a3-b124-5581d2e4d11a",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "M = [[]]"
    ]
   },
   {
@@ -73,9 +86,107 @@
     "tags": []
    },
    "source": [
-    "We will now check the properties programmatically in the next questions."
+    "Write a function that caculates the degree using the dictionnary data structure:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "64570050-4358-4f6f-bc47-d40cc11caccb",
+   "metadata": {
+    "deletable": false,
+    "nbgrader": {
+     "cell_type": "code",
+     "checksum": "06689d18aeb4da61ebaf404b394d1a2f",
+     "grade": false,
+     "grade_id": "cell-9d8017340cffddbb",
+     "locked": false,
+     "schema_version": 3,
+     "solution": true,
+     "task": false
+    },
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "def degree_dict(g, node):\n",
+    "    # YOUR CODE HERE\n",
+    "    raise NotImplementedError()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "8ef7c05c-0003-4eca-ac67-e4c712fa2b45",
+   "metadata": {
+    "tags": []
+   },
+   "source": [
+    "Write a function that caculates the degree using the matrix data structure:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "b6c61914-196b-4a4c-9309-70d08cd32bc5",
+   "metadata": {
+    "deletable": false,
+    "nbgrader": {
+     "cell_type": "code",
+     "checksum": "4118a7f0d5d0d42c626693f77b61c60e",
+     "grade": false,
+     "grade_id": "cell-99551fa4c7868af9",
+     "locked": false,
+     "schema_version": 3,
+     "solution": true,
+     "task": false
+    },
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "def degree_matrix(M, node):\n",
+    "    # YOUR CODE HERE\n",
+    "    raise NotImplementedError()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "81622da3-97c5-470e-af37-deb760cc009c",
+   "metadata": {},
+   "source": [
+    "Write tests"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "bcaeac38-5109-444b-ab06-474bd570459a",
+   "metadata": {
+    "deletable": false,
+    "nbgrader": {
+     "cell_type": "code",
+     "checksum": "5efef8ca414623dc53969edbb004e64b",
+     "grade": false,
+     "grade_id": "cell-eef2d364b9c640f2",
+     "locked": false,
+     "schema_version": 3,
+     "solution": true,
+     "task": false
+    },
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "# YOUR CODE HERE\n",
+    "raise NotImplementedError()"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "651a7b71-f636-4289-b13f-973ac71629d7",
+   "metadata": {},
+   "source": []
+  },
   {
    "cell_type": "markdown",
    "id": "2d324f2e-25d4-488b-9178-c29f52caee1a",