diff --git a/module3/exo3/exercice.ipynb b/module3/exo3/exercice.ipynb
index 9175caba554ed48074ca656110a7c1b2288fdddf..7832856fb53100543fc9087b2d1c32d62d5816d0 100644
--- a/module3/exo3/exercice.ipynb
+++ b/module3/exo3/exercice.ipynb
@@ -9,7 +9,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 20,
+   "execution_count": 17,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -30,7 +30,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 21,
+   "execution_count": 18,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -39,7 +39,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 22,
+   "execution_count": 19,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -60,7 +60,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 23,
+   "execution_count": 20,
    "metadata": {},
    "outputs": [
     {
@@ -268,7 +268,7 @@
        "9  314.93           316.22  MLO  "
       ]
      },
-     "execution_count": 23,
+     "execution_count": 20,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -287,7 +287,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 24,
+   "execution_count": 21,
    "metadata": {},
    "outputs": [
     {
@@ -495,7 +495,7 @@
        "11  312.42       315.41  MLO  "
       ]
      },
-     "execution_count": 24,
+     "execution_count": 21,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -517,7 +517,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 25,
+   "execution_count": 22,
    "metadata": {},
    "outputs": [
     {
@@ -625,7 +625,7 @@
        "11  21473  312.42       315.41"
       ]
      },
-     "execution_count": 25,
+     "execution_count": 22,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -644,7 +644,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 27,
+   "execution_count": 23,
    "metadata": {},
    "outputs": [
     {
@@ -752,7 +752,7 @@
        "11  21473  312.42        315.41"
       ]
      },
-     "execution_count": 27,
+     "execution_count": 23,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -774,7 +774,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 29,
+   "execution_count": 24,
    "metadata": {},
    "outputs": [
     {
@@ -882,7 +882,7 @@
        "13  21534  314.67        315.44"
       ]
      },
-     "execution_count": 29,
+     "execution_count": 24,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -902,7 +902,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 30,
+   "execution_count": 25,
    "metadata": {},
    "outputs": [
     {
@@ -1010,7 +1010,7 @@
        "13 1958-12  314.67        315.44"
       ]
      },
-     "execution_count": 30,
+     "execution_count": 25,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -1035,7 +1035,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 57,
+   "execution_count": 26,
    "metadata": {},
    "outputs": [
     {
@@ -1138,7 +1138,7 @@
        "1958-12  314.67        315.44"
       ]
      },
-     "execution_count": 57,
+     "execution_count": 26,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -1158,16 +1158,16 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 33,
+   "execution_count": 27,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "<matplotlib.axes._subplots.AxesSubplot at 0x7fd6a4e34e10>"
+       "<matplotlib.axes._subplots.AxesSubplot at 0x7f747e8c1128>"
       ]
      },
-     "execution_count": 33,
+     "execution_count": 27,
      "metadata": {},
      "output_type": "execute_result"
     },
@@ -1201,16 +1201,16 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 34,
+   "execution_count": 28,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "<matplotlib.axes._subplots.AxesSubplot at 0x7fd6a2cb66d8>"
+       "<matplotlib.axes._subplots.AxesSubplot at 0x7f747e82dba8>"
       ]
      },
-     "execution_count": 34,
+     "execution_count": 28,
      "metadata": {},
      "output_type": "execute_result"
     },
@@ -1241,16 +1241,16 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 36,
+   "execution_count": 29,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "<matplotlib.axes._subplots.AxesSubplot at 0x7fd69ebe0c50>"
+       "<matplotlib.axes._subplots.AxesSubplot at 0x7f747e798240>"
       ]
      },
-     "execution_count": 36,
+     "execution_count": 29,
      "metadata": {},
      "output_type": "execute_result"
     },
@@ -1281,16 +1281,16 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 49,
+   "execution_count": 30,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "<matplotlib.axes._subplots.AxesSubplot at 0x7fd69e367518>"
+       "<matplotlib.axes._subplots.AxesSubplot at 0x7f747e6db4e0>"
       ]
      },
-     "execution_count": 49,
+     "execution_count": 30,
      "metadata": {},
      "output_type": "execute_result"
     },
@@ -1326,7 +1326,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 86,
+   "execution_count": 31,
    "metadata": {},
    "outputs": [
     {
@@ -1339,10 +1339,10 @@
     {
      "data": {
       "text/plain": [
-       "<matplotlib.axes._subplots.AxesSubplot at 0x7fd69c04e898>"
+       "<matplotlib.axes._subplots.AxesSubplot at 0x7f747e60b5f8>"
       ]
      },
-     "execution_count": 86,
+     "execution_count": 31,
      "metadata": {},
      "output_type": "execute_result"
     },
@@ -1367,8 +1367,8 @@
     "\n",
     "dates = []\n",
     "for i in range(1, nb_months+1):\n",
-    "    year = last_period_in_data.year+i//12\n",
-    "    month = last_period_in_data.month+i%12\n",
+    "    year = last_date_in_data.year+i//12\n",
+    "    month = last_date_in_data.month+i%12\n",
     "    dates.append(pd.Period(year=year, month=month, freq=\"M\"))\n",
     "\n",
     "a = 32\n",
@@ -1389,16 +1389,9 @@
    "metadata": {},
    "source": [
     "On peut estimer que :\n",
-    "    - la concentration de CO2 dans l'atmosphère au début 2025 est d'environ 431ppm\n",
-    "    - elle augmente jusqu'à 434ppm à la fin 2025."
+    "- la concentration de CO2 dans l'atmosphère au début 2025 est d'environ 431ppm\n",
+    "- elle augmente jusqu'à 434ppm à la fin 2025."
    ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
   }
  ],
  "metadata": {