diff --git a/module3/exo3/exercice.ipynb b/module3/exo3/exercice.ipynb
index ce3753721cb869f31e3011a2ae9be60eafcac634..caa4447ee93e81d8a085d46bb28bb96163cc3092 100644
--- a/module3/exo3/exercice.ipynb
+++ b/module3/exo3/exercice.ipynb
@@ -113,7 +113,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 39,
+   "execution_count": 7,
    "metadata": {},
    "outputs": [
     {
@@ -164,36 +164,38 @@
     "data['Date'] = pd.to_datetime(data['Date'])\n",
     "# Extrayez l'année de la colonne 'Date' et créez une nouvelle colonne 'Année'\n",
     "data['Year'] = data['Date'].dt.year\n",
+    "# Affichage des premières lignes des données pour vérification\n",
     "print(data.head())"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 51,
+   "execution_count": 9,
    "metadata": {},
    "outputs": [
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "        Date  Concentration  Year  Mean_CO2_Concentration  Oscilation\n",
-      "0 1958-03-29         316.19  1958                 315.474       0.716\n",
-      "1 1958-04-05         317.31  1958                 315.474       1.836\n",
-      "2 1958-04-12         317.69  1958                 315.474       2.216\n",
-      "3 1958-04-19         317.58  1958                 315.474       2.106\n",
-      "4 1958-04-26         316.48  1958                 315.474       1.006\n"
+      "        Date  Concentration  Year  Mean_CO2_Concentration\n",
+      "0 1958-03-29         316.19  1958                 315.474\n",
+      "1 1958-04-05         317.31  1958                 315.474\n",
+      "2 1958-04-12         317.69  1958                 315.474\n",
+      "3 1958-04-19         317.58  1958                 315.474\n",
+      "4 1958-04-26         316.48  1958                 315.474\n"
      ]
     }
    ],
    "source": [
     "# Contribution lente. Calculez la valeur moyenne par an et créez une nouvelle colonne 'Concentration moyenne de CO2'\n",
     "data['Mean_CO2_Concentration'] = data.groupby('Year')['Concentration'].transform('mean')\n",
+    "# Affichage des premières lignes des données pour vérification\n",
     "print(data.head())"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 38,
+   "execution_count": 10,
    "metadata": {},
    "outputs": [
     {
@@ -222,7 +224,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 11,
+   "execution_count": 35,
    "metadata": {},
    "outputs": [
     {
@@ -239,14 +241,15 @@
     }
    ],
    "source": [
-    "# Obtencion de la oscilacion et créez une nouvelle colonne 'Oscilation'\n",
+    "# Oscillation périodique. Obtencion de la oscilacion et créez une nouvelle colonne 'Oscilation'\n",
     "data['Oscilation'] = data['Concentration']-data['Mean_CO2_Concentration']\n",
+    "# Affichage des premières lignes des données pour vérification\n",
     "print(data.head())"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 41,
+   "execution_count": 12,
    "metadata": {},
    "outputs": [
     {
@@ -275,7 +278,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 43,
+   "execution_count": 13,
    "metadata": {},
    "outputs": [
     {
@@ -315,7 +318,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 44,
+   "execution_count": 15,
    "metadata": {},
    "outputs": [
     {
@@ -362,7 +365,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 45,
+   "execution_count": 16,
    "metadata": {},
    "outputs": [
     {
@@ -401,12 +404,14 @@
     }
    ],
    "source": [
+    "# Oscillation périodique. Caractériser l’oscillation\n",
+    "# Affichage des premières lignes des données pour vérification\n",
     "print(data.head())"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 46,
+   "execution_count": 18,
    "metadata": {},
    "outputs": [
     {
@@ -437,7 +442,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 47,
+   "execution_count": 19,
    "metadata": {},
    "outputs": [
     {
@@ -449,13 +454,13 @@
     }
    ],
    "source": [
-    "# Comment caractériser l'oscillation en calculant la transformée de Fourier donne des valeurs pas faciles à comprendre a priori, une autre manière est choisie pour caractériser l'oscillation\n",
+    "# Oscillation périodique. Comment caractériser l'oscillation en calculant la transformée de Fourier donne des valeurs pas faciles à comprendre a priori, une autre manière est choisie pour caractériser l'oscillation\n",
     "print(\"Comment caractériser l'oscillation périodique en calculant la transformée de Fourier donne des valeurs pas faciles à comprendre a priori, une autre manière est choisie pour caractériser l'oscillation\")"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 48,
+   "execution_count": 20,
    "metadata": {},
    "outputs": [
     {
@@ -484,7 +489,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 24,
+   "execution_count": 21,
    "metadata": {},
    "outputs": [
     {
@@ -509,7 +514,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 49,
+   "execution_count": 22,
    "metadata": {},
    "outputs": [
     {
@@ -539,7 +544,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 50,
+   "execution_count": 23,
    "metadata": {},
    "outputs": [
     {
@@ -579,7 +584,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 27,
+   "execution_count": 24,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -592,7 +597,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 28,
+   "execution_count": 25,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -607,7 +612,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 29,
+   "execution_count": 26,
    "metadata": {},
    "outputs": [
     {
@@ -637,7 +642,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 30,
+   "execution_count": 27,
    "metadata": {},
    "outputs": [
     {
@@ -667,7 +672,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 31,
+   "execution_count": 28,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -689,7 +694,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 32,
+   "execution_count": 29,
    "metadata": {},
    "outputs": [
     {
@@ -719,7 +724,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 33,
+   "execution_count": 30,
    "metadata": {},
    "outputs": [
     {
@@ -749,7 +754,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 34,
+   "execution_count": 31,
    "metadata": {},
    "outputs": [
     {
@@ -778,7 +783,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 35,
+   "execution_count": 32,
    "metadata": {},
    "outputs": [
     {
@@ -807,7 +812,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 36,
+   "execution_count": 33,
    "metadata": {},
    "outputs": [
     {
@@ -836,7 +841,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 37,
+   "execution_count": 34,
    "metadata": {},
    "outputs": [
     {
@@ -870,27 +875,6 @@
    "outputs": [],
    "source": []
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
-  },
   {
    "cell_type": "code",
    "execution_count": null,