diff --git a/lab-python-functions.ipynb b/lab-python-functions.ipynb
index 44d337b..58cdb08 100644
--- a/lab-python-functions.ipynb
+++ b/lab-python-functions.ipynb
@@ -5,7 +5,8 @@
    "id": "25d7736c-ba17-4aff-b6bb-66eba20fbf4e",
    "metadata": {},
    "source": [
-    "# Lab | Functions"
+    "# Lab 03 | Functions\n",
+    "-------"
    ]
   },
   {
@@ -41,13 +42,342 @@
     "- Utilize function parameters and return values to transfer data between functions.\n",
     "- Test your functions individually to ensure they work correctly.\n",
     "\n",
-    "\n"
+    "------\n"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d6bf0c1e",
+   "metadata": {},
+   "source": [
+    "# Solved Lab 03 | Functions\n",
+    "------"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "9972bdb3",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#0. List of products from the previous lab\n",
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "91749d13",
+   "metadata": {},
+   "source": [
+    "1. Define a function named `initialize_inventory` that takes `products` as a parameter. Inside the function, implement the code for initializing the inventory dictionary using a loop and user input."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1ae5a04a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#1. def Function : initialize_inventory(products)\n",
+    "# Initialize inventory dict using a loop and user input\n",
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    for item in products:\n",
+    "        while True:\n",
+    "            quantity = input(f\"Enter quantity for {item}: \")\n",
+    "            if quantity.isdigit():              # Checks if the input contains only digits\n",
+    "                inventory[item] = int(quantity) # key is item, value is quantity \n",
+    "                print(f\"✅ Quantity = {inventory[item]} for {item}\")\n",
+    "                break\n",
+    "            else:\n",
+    "                print(f\"⚠ Invalid input! Please enter a number only for {item}\")\n",
+    "    return inventory"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ab98b5bd",
+   "metadata": {},
+   "source": [
+    "\n",
+    "2. Define a function named `get_customer_orders` that takes no parameters. Inside the function, implement the code for prompting the user to enter the product names using a loop. The function should return the `customer_orders` set."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "6c2aa017",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#2. def Function : get_customer_orders \n",
+    "def get_customer_orders():\n",
+    "    products = {\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"}\n",
+    "    customer_orders = set()\n",
+    "\n",
+    "    product = \"\"\n",
+    "    while product != \"purchase\":\n",
+    "        product = input(\"Enter a product name to order (or type 'PURCHASE' to finish): \").strip().lower()\n",
+    "\n",
+    "        # Empty input\n",
+    "        if product == \"\":\n",
+    "            print(\"⚠ You didn't type anything. Please enter a product name.\")\n",
+    "            continue\n",
+    "        \n",
+    "        # Finish purchase\n",
+    "        if product == \"purchase\":\n",
+    "            break\n",
+    "\n",
+    "        # Valid product\n",
+    "        if product in products:\n",
+    "            customer_orders.add(product)\n",
+    "            print(f\"✅ '{product}' added to your order.\")\n",
+    "\n",
+    "        # Invalid product\n",
+    "        else:\n",
+    "            print(f\"❌ '{product}' is not available.\")\n",
+    "            print(f\"Available products: ,{products}\")\n",
+    "\n",
+    "    print(\"\\n✅ Purchase complete!\")\n",
+    "    print(\"Your purchase list:\", customer_orders)\n",
+    "    return customer_orders"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "415cf4c0",
+   "metadata": {},
+   "source": [
+    "\n",
+    "3. Define a function named `update_inventory` that takes `customer_orders` and `inventory` as parameters. Inside the function, implement the code for updating the inventory dictionary based on the customer orders."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "233c68ec",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#3. def Function : update_inventory(customer_orders, inventory)\n",
+    "def update_inventory(customer_orders:set, inventory:dict):\n",
+    "    list_customer_orders = list(customer_orders)  # store set as a list for processing\n",
+    "    while True:\n",
+    "        for item in list_customer_orders:  # Use the list for iteration\n",
+    "            # Update the inventory based on customer orders\n",
+    "            if item in inventory and inventory[item] > 0:   \n",
+    "                inventory[item] -= 1 # Decrease the quantity by 1\n",
+    "            # If the quantity reaches zero, remove the item from the inventory\n",
+    "            elif item in inventory and inventory[item] == 0:  \n",
+    "                print(f\"{item} is out of stock and has been removed from the inventory.\")\n",
+    "            # If the item is not found in the inventory, print a message\n",
+    "            else:  \n",
+    "                print(f\"{item} is not available in the inventory.\")\n",
+    "        return inventory"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "65d44dad",
+   "metadata": {},
+   "source": [
+    "\n",
+    "4. Define a function named `calculate_order_statistics` that takes `customer_orders` and `products` as parameters. Inside the function, implement the code for calculating the order statistics (total products ordered, and percentage of unique products ordered). The function should return these values."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "96dc59c8",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#4. def Function : calculate_order_statistics(customer_orders, products)\n",
+    "\n",
+    "def calculate_order_statistics(customer_orders:set, products:list):\n",
+    "\n",
+    "    # Total products ordered\n",
+    "    total_products_ordered = len(customer_orders)\n",
+    "\n",
+    "    # Unique products ordered that exist in the product list\n",
+    "    unique_products_ordered = len(customer_orders.intersection(products))\n",
+    "\n",
+    "    # Percentage calculation (avoid division by zero)\n",
+    "    percentage_unique = (unique_products_ordered / len(products) * 100) if products else 0\n",
+    "    \n",
+    "    order_statistics = {\n",
+    "        \"total_products_ordered\": total_products_ordered,\n",
+    "        \"percentage_unique_products_ordered\": percentage_unique,\n",
+    "    }\n",
+    "    return total_products_ordered, percentage_unique\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "77c72854",
+   "metadata": {},
+   "source": [
+    "\n",
+    "5. Define a function named `print_order_statistics` that takes `order_statistics` as a parameter. Inside the function, implement the code for printing the order statistics."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "c360caba",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#5. def Function : print_order_statistics(order_statistics)\n",
+    "# DICT\n",
+    "order_statistics = {}\n",
+    "order_statistics[\"total_products_ordered\"], order_statistics[\"percentage_unique_products_ordered\"] = calculate_order_statistics(get_customer_orders(), products)\n",
+    "\n",
+    "def print_order_statistics(order_statistics:dict):\n",
+    "\n",
+    "    # Extract the dictionary if wrapped in a tuple\n",
+    "    if isinstance(order_statistics, tuple) and len(order_statistics) > 0:\n",
+    "        order_statistics = order_statistics[0]    \n",
+    "    # Print order statistics\n",
+    "    for product, quantity in order_statistics.items():\n",
+    "        print(f\"Product: {product}, Quantity Remaining: {quantity}\\n\") "
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "1d00fd4f",
+   "metadata": {},
+   "source": [
+    "6. Define a function named `print_updated_inventory` that takes `inventory` as a parameter. Inside the function, implement the code for printing the updated inventory."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 105,
+   "id": "15431b0d",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Updated Inventory:\n",
+      "Product: t-shirt, Quantity: 10\n",
+      "Product: mug, Quantity: 20\n",
+      "Product: hat, Quantity: 30\n",
+      "Product: book, Quantity: 40\n",
+      "Product: keychain, Quantity: 50\n"
+     ]
+    }
+   ],
+   "source": [
+    "#6. def Function : print_updated_inventory(inventory)\n",
+    "def print_updated_inventory(inventory):\n",
+    "        print(f\"Updated Inventory:\")\n",
+    "        for product, quantity in inventory.items():\n",
+    "            print(f\"Product: {product}, Quantity: {quantity}\")\n",
+    "\n",
+    "print_updated_inventory(inventory)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0b05f70a",
+   "metadata": {},
+   "source": [
+    "7. Call the functions in the appropriate sequence to execute the program and manage customer orders."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 103,
+   "id": "9c570942",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "List of products: ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n",
+      "✅ Quantity = 10 for t-shirt\n",
+      "✅ Quantity = 20 for mug\n",
+      "✅ Quantity = 30 for hat\n",
+      "✅ Quantity = 40 for book\n",
+      "✅ Quantity = 60 for keychain\n",
+      "✅ 'keychain' added to your order.\n",
+      "❌ 'haty' is not available.\n",
+      "Available products: ,{'book', 't-shirt', 'keychain', 'mug', 'hat'}\n",
+      "✅ 'hat' added to your order.\n",
+      "✅ 'book' added to your order.\n",
+      "\n",
+      "✅ Purchase complete!\n",
+      "Your purchase list: {'keychain', 'hat', 'book'}\n",
+      "⚠ You didn't type anything. Please enter a product name.\n",
+      "⚠ You didn't type anything. Please enter a product name.\n",
+      "⚠ You didn't type anything. Please enter a product name.\n",
+      "⚠ You didn't type anything. Please enter a product name.\n",
+      "⚠ You didn't type anything. Please enter a product name.\n",
+      "⚠ You didn't type anything. Please enter a product name.\n",
+      "⚠ You didn't type anything. Please enter a product name.\n"
+     ]
+    },
+    {
+     "ename": "KeyboardInterrupt",
+     "evalue": "Interrupted by user",
+     "output_type": "error",
+     "traceback": [
+      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
+      "\u001b[1;31mKeyboardInterrupt\u001b[0m                         Traceback (most recent call last)",
+      "Cell \u001b[1;32mIn[103], line 16\u001b[0m\n\u001b[0;32m     12\u001b[0m get_customer_orders()\n\u001b[0;32m     15\u001b[0m \u001b[38;5;66;03m#3. call Function : update_inventory(customer_orders, inventory)\u001b[39;00m\n\u001b[1;32m---> 16\u001b[0m update_inventory(get_customer_orders(), initialize_inventory(products))\n\u001b[0;32m     18\u001b[0m \u001b[38;5;66;03m#4. call Function : calculate_order_statistics(customer_orders, products)\u001b[39;00m\n\u001b[0;32m     19\u001b[0m order_statistics \u001b[38;5;241m=\u001b[39m calculate_order_statistics(customer_orders\u001b[38;5;241m=\u001b[39mget_customer_orders(), products\u001b[38;5;241m=\u001b[39mproducts)\n",
+      "Cell \u001b[1;32mIn[98], line 8\u001b[0m, in \u001b[0;36mget_customer_orders\u001b[1;34m()\u001b[0m\n\u001b[0;32m      6\u001b[0m product \u001b[38;5;241m=\u001b[39m \u001b[38;5;124m\"\u001b[39m\u001b[38;5;124m\"\u001b[39m\n\u001b[0;32m      7\u001b[0m \u001b[38;5;28;01mwhile\u001b[39;00m product \u001b[38;5;241m!=\u001b[39m \u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mpurchase\u001b[39m\u001b[38;5;124m\"\u001b[39m:\n\u001b[1;32m----> 8\u001b[0m     product \u001b[38;5;241m=\u001b[39m \u001b[38;5;28minput\u001b[39m(\u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mEnter a product name to order (or type \u001b[39m\u001b[38;5;124m'\u001b[39m\u001b[38;5;124mPURCHASE\u001b[39m\u001b[38;5;124m'\u001b[39m\u001b[38;5;124m to finish): \u001b[39m\u001b[38;5;124m\"\u001b[39m)\u001b[38;5;241m.\u001b[39mstrip()\u001b[38;5;241m.\u001b[39mlower()\n\u001b[0;32m     10\u001b[0m     \u001b[38;5;66;03m# Empty input\u001b[39;00m\n\u001b[0;32m     11\u001b[0m     \u001b[38;5;28;01mif\u001b[39;00m product \u001b[38;5;241m==\u001b[39m \u001b[38;5;124m\"\u001b[39m\u001b[38;5;124m\"\u001b[39m:\n",
+      "File \u001b[1;32mc:\\Users\\sboub\\anaconda3\\Lib\\site-packages\\ipykernel\\kernelbase.py:1282\u001b[0m, in \u001b[0;36mKernel.raw_input\u001b[1;34m(self, prompt)\u001b[0m\n\u001b[0;32m   1280\u001b[0m     msg \u001b[38;5;241m=\u001b[39m \u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mraw_input was called, but this frontend does not support input requests.\u001b[39m\u001b[38;5;124m\"\u001b[39m\n\u001b[0;32m   1281\u001b[0m     \u001b[38;5;28;01mraise\u001b[39;00m StdinNotImplementedError(msg)\n\u001b[1;32m-> 1282\u001b[0m \u001b[38;5;28;01mreturn\u001b[39;00m \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39m_input_request(\n\u001b[0;32m   1283\u001b[0m     \u001b[38;5;28mstr\u001b[39m(prompt),\n\u001b[0;32m   1284\u001b[0m     \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39m_parent_ident[\u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mshell\u001b[39m\u001b[38;5;124m\"\u001b[39m],\n\u001b[0;32m   1285\u001b[0m     \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39mget_parent(\u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mshell\u001b[39m\u001b[38;5;124m\"\u001b[39m),\n\u001b[0;32m   1286\u001b[0m     password\u001b[38;5;241m=\u001b[39m\u001b[38;5;28;01mFalse\u001b[39;00m,\n\u001b[0;32m   1287\u001b[0m )\n",
+      "File \u001b[1;32mc:\\Users\\sboub\\anaconda3\\Lib\\site-packages\\ipykernel\\kernelbase.py:1325\u001b[0m, in \u001b[0;36mKernel._input_request\u001b[1;34m(self, prompt, ident, parent, password)\u001b[0m\n\u001b[0;32m   1322\u001b[0m \u001b[38;5;28;01mexcept\u001b[39;00m \u001b[38;5;167;01mKeyboardInterrupt\u001b[39;00m:\n\u001b[0;32m   1323\u001b[0m     \u001b[38;5;66;03m# re-raise KeyboardInterrupt, to truncate traceback\u001b[39;00m\n\u001b[0;32m   1324\u001b[0m     msg \u001b[38;5;241m=\u001b[39m \u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mInterrupted by user\u001b[39m\u001b[38;5;124m\"\u001b[39m\n\u001b[1;32m-> 1325\u001b[0m     \u001b[38;5;28;01mraise\u001b[39;00m \u001b[38;5;167;01mKeyboardInterrupt\u001b[39;00m(msg) \u001b[38;5;28;01mfrom\u001b[39;00m\u001b[38;5;250m \u001b[39m\u001b[38;5;28;01mNone\u001b[39;00m\n\u001b[0;32m   1326\u001b[0m \u001b[38;5;28;01mexcept\u001b[39;00m \u001b[38;5;167;01mException\u001b[39;00m:\n\u001b[0;32m   1327\u001b[0m     \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39mlog\u001b[38;5;241m.\u001b[39mwarning(\u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mInvalid Message:\u001b[39m\u001b[38;5;124m\"\u001b[39m, exc_info\u001b[38;5;241m=\u001b[39m\u001b[38;5;28;01mTrue\u001b[39;00m)\n",
+      "\u001b[1;31mKeyboardInterrupt\u001b[0m: Interrupted by user"
+     ]
+    }
+   ],
+   "source": [
+    "#7. call all functions above in the appropriate sequence to execute the program and manage customer orders:\n",
+    "\n",
+    "# def List: products   \n",
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "print('List of products:', products)\n",
+    "\n",
+    "# call Functions order:\n",
+    "#1. call Function : initialize_inventory(products)\n",
+    "initialize_inventory(products)\n",
+    "\n",
+    "#2. call Function : get_customer_orders()\n",
+    "get_customer_orders()\n",
+    "\n",
+    "\n",
+    "#3. call Function : update_inventory(customer_orders, inventory)\n",
+    "update_inventory(get_customer_orders(), initialize_inventory(products))\n",
+    "\n",
+    "#4. call Function : calculate_order_statistics(customer_orders, products)\n",
+    "order_statistics = calculate_order_statistics(customer_orders=get_customer_orders(), products=products)\n",
+    "\n",
+    "#5. call Function : print_order_statistics(order_statistics)\n",
+    "print_order_statistics(order_statistics)\n",
+    "\n",
+    "#6. call Function : print_updated_inventory(inventory)\n",
+    "print_updated_inventory(inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a378e516",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "base",
    "language": "python",
    "name": "python3"
   },
@@ -61,7 +391,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.5"
   }
  },
  "nbformat": 4,