diff --git a/TP04/Illustration_sans_titre.png b/TP04/Illustration_sans_titre.png
new file mode 100644
index 0000000..c455d27
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diff --git a/TP04/Untitled.ipynb b/TP04/Untitled.ipynb
index f7e8927..88a2276 100644
--- a/TP04/Untitled.ipynb
+++ b/TP04/Untitled.ipynb
@@ -140,10 +140,42 @@
     "| 19 | 0.12004 | 74.97214 |"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "c9fed1c7-6c60-4589-8086-3f8fefec8fca",
+   "metadata": {},
+   "source": [
+    "# Exercice 4 :\n",
+    "## 1)\n",
+    "![image](Illustration_sans_titre.png)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "04ea9f05-9b2d-43a9-86bf-afa9f17f0336",
+   "metadata": {},
+   "source": [
+    "## 2)\n",
+    "\n",
+    "data : 01 11 10 00\n",
+    "\n",
+    "| _ | 01 | 11 | 10 | 00 |\n",
+    "| :--------------- |:---------------:| -----:| -----:| -----:|\n",
+    "| W0 | 2 | 1 | 1 | 0 |\n",
+    "| W1 | 0 | 0 | 0 | 1 |\n",
+    "| W2 | 0 | 1 | 1 | 1 |\n",
+    "| RF |-2 | 0 | -1 | 0 |\n",
+    "| RO | 0 | 0 | 0 | 0 |\n",
+    "| RA | 1 | 0 | 1 | 0 |\n",
+    "| W0' | 2+(1-0)*-1 = 1 | 1 | 1+(1-0)*-1 = 0 | 0 |\n",
+    "| W1' | 0+(1-0)*0 = 0 | 0 | 0+(1-0)*1 = 1 | 1 |\n",
+    "| W2' | 0+(1-0)*1 = 1 | 1 | 1+(1-0)*0 = 1 | 1 |"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "d86080eb-bab5-4a25-bf98-2446840313f6",
+   "id": "d205f2d3-a9cb-4c8b-964d-a25f18f793d3",
    "metadata": {},
    "outputs": [],
    "source": []