diff --git a/lab-oop_in_python.ipynb b/lab-oop_in_python.ipynb
index 3142c5e..37cbf82 100644
--- a/lab-oop_in_python.ipynb
+++ b/lab-oop_in_python.ipynb
@@ -30,17 +30,31 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 14,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "250 5\n"
+     ]
+    }
+   ],
    "source": [
     "# Your code here\n",
     "class Vehicle:\n",
     "    # Hint: Define __init__ method with parameters for max_speed and mileage\n",
     "    pass\n",
+    "# Constructor\n",
+    "    def __init__(self, max_speed, mileage):\n",
+    "        self.max_speed = max_speed\n",
+    "        self.mileage = mileage\n",
     "\n",
     "# Example instantiation\n",
-    "modelX = Vehicle()  # Create an instance of Vehicle\n",
+    "modelX = Vehicle(250,5)  # Create an instance of Vehicle\n",
+    "def __init__(self, max_speed, mileage):\n",
+    "    super().__init__(max_speed, mileage)\n",
     "\n",
     "# Print attributes\n",
     "print(modelX.max_speed, modelX.mileage)  # Expected output: (value of max_speed, value of mileage)"
@@ -56,7 +70,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 19,
    "metadata": {},
    "outputs": [
     {
@@ -70,7 +84,9 @@
    "source": [
     "# Your code here\n",
     "class Vehicle:\n",
-    "    pass\n",
+    "    def __init__(self):\n",
+    "        pass\n",
+    "    \n",
     "\n",
     "# Example instantiation\n",
     "my_vehicle = Vehicle()\n",
@@ -87,7 +103,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 21,
    "metadata": {},
    "outputs": [
     {
@@ -101,7 +117,8 @@
    "source": [
     "# Your code here\n",
     "class Bus(Vehicle):\n",
-    "    pass\n",
+    "    def __init__(self):\n",
+    "        super().__init__()\n",
     "\n",
     "# Example instantiation\n",
     "school_bus = Bus()\n",
@@ -118,14 +135,14 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Base fare\n"
+      "Base fare with extra charge\n"
      ]
     }
    ],
@@ -137,7 +154,12 @@
     "\n",
     "class Bus(Vehicle):\n",
     "    # Hint: Override fare method to include extra charges\n",
-    "    pass\n",
+    "    def __init__(self):\n",
+    "        super().__init__()\n",
+    "    \n",
+    "    def fare(self):\n",
+    "        # Overrides the parent method and adds extra charges\n",
+    "        return super().fare() + \" with extra charge\"\n",
     "\n",
     "school_bus = Bus()\n",
     "print(school_bus.fare())  # Expected output: \"Base fare with extra charge\""
@@ -153,14 +175,14 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 41,
    "metadata": {},
    "outputs": [
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "White\n"
+      "white\n"
      ]
     }
    ],
@@ -169,12 +191,13 @@
     "class Vehicle:\n",
     "    color = \"White\"  # Hint: Define color as a class attribute\n",
     "\n",
-    "    def __init__(self, name, max_speed, mileage):\n",
+    "    def __init__(self, name, max_speed, mileage, color):\n",
     "        self.name = name\n",
     "        self.max_speed = max_speed\n",
     "        self.mileage = mileage\n",
+    "        self.color = color\n",
     "\n",
-    "school_bus = Vehicle(\"School Volvo\", 180, 12)\n",
+    "school_bus = Vehicle(\"School Volvo\", 180, 12, \"white\")\n",
     "print(school_bus.color)  # Expected output: \"White\""
    ]
   },
@@ -188,14 +211,14 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Total Bus fare is: 5000\n"
+      "Total Bus fare is: 5500.0\n"
      ]
     }
    ],
@@ -211,8 +234,9 @@
     "        return self.capacity * 100\n",
     "\n",
     "class Bus(Vehicle):\n",
-    "    # Hint: Override fare method to include maintenance charge\n",
-    "    pass\n",
+    "    # Hint: Overrides fare method to include maintenance charge\n",
+    "    def fare(self):\n",
+    "        return super().fare() * 1.1\n",
     "\n",
     "school_bus = Bus(\"School Volvo\", 12, 50)\n",
     "print(\"Total Bus fare is:\", school_bus.fare())  # Expected output: Total Bus fare is: (calculated amount)"
@@ -228,21 +252,23 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": 46,
    "metadata": {},
    "outputs": [
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "<class '__main__.Bus'>\n"
+      "<class '__main__.Bus'>\n",
+      "True\n"
      ]
     }
    ],
    "source": [
     "# Your code here\n",
     "school_bus = Bus(\"School Volvo\", 12, 50)\n",
-    "print(type(school_bus))  # Expected output: <class '__main__.Bus'>"
+    "print(type(school_bus))  # Expected output: <class '__main__.Bus'>\n",
+    "print(isinstance(school_bus, Bus))"
    ]
   },
   {
@@ -255,7 +281,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 8,
+   "execution_count": 47,
    "metadata": {},
    "outputs": [
     {
@@ -287,7 +313,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": ".venv",
+   "display_name": "base",
    "language": "python",
    "name": "python3"
   },
@@ -301,7 +327,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.8.0"
+   "version": "3.13.5"
   }
  },
  "nbformat": 4,