diff --git a/lab-python-functions.ipynb b/lab-python-functions.ipynb
index 44d337b..6538110 100644
--- a/lab-python-functions.ipynb
+++ b/lab-python-functions.ipynb
@@ -19,29 +19,278 @@
     "\n",
     "In the previous exercise, you improved the code for managing customer orders by using loops and flow control. Now, let's take it a step further and refactor the code by introducing functions.\n",
     "\n",
-    "Follow the steps below to complete the exercise:\n",
+    "Follow the steps below to complete the exercise:"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "5651c944",
+   "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": 37,
+   "id": "460c68f6",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "inventory updated:\n",
+      "{'t-shirt': 6, 'mug': 7, 'hat': 8, 'book': 3, 'keychain': 5}\n"
+     ]
+    }
+   ],
+   "source": [
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
     "\n",
-    "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.\n",
+    "def initialize_inventory (products):\n",
+    "    inventory = {}\n",
+    "    for item in products:\n",
+    "        quantity = int(input(f\"how many {item} I have ?\"))\n",
+    "        inventory [item] = quantity\n",
+    "    return (inventory)\n",
     "\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.\n",
+    "inventory = initialize_inventory (products)\n",
     "\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.\n",
+    "print (\"inventory updated:\")\n",
+    "print (inventory)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "fc6003cc",
+   "metadata": {},
+   "source": [
+    "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": 8,
+   "id": "bc8b40a6",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "mug added to your order\n",
+      "iguana is not a product available\n",
+      "book added to your order\n",
+      "hat added to your order\n",
+      "keychain added to your order\n",
+      "products ordered\n",
+      "{'book', 'keychain', 'mug', 'hat'}\n"
+     ]
+    }
+   ],
+   "source": [
+    "def get_customer_orders ():\n",
+    "    customer_orders = set()\n",
+    "    while True:\n",
+    "      item = input(\"What product you want to order (t-shirt, mug, hat, book, keychain)? \")\n",
+    "      if item in products:\n",
+    "        customer_orders.add(item)\n",
+    "        print (f'{item}', \"added to your order\")\n",
+    "      else:\n",
+    "         print (f'{item}' , \"is not a product available\")\n",
+    "      more_items = input (\"want to add another product (yes/no)\")\n",
+    "      if more_items != \"yes\":\n",
+    "         break\n",
+    "    return (customer_orders)  \n",
+    "      \n",
+    "customer_orders = get_customer_orders ()\n",
     "\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.\n",
+    "print (\"products ordered\")\n",
+    "print (customer_orders)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "41a22c63",
+   "metadata": {},
+   "source": [
+    "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": 38,
+   "id": "c8ad03e9",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "book uptaded now there's {2} left in inventory\n",
+      "keychain uptaded now there's {4} left in inventory\n",
+      "mug uptaded now there's {6} left in inventory\n",
+      "hat uptaded now there's {7} left in inventory\n",
+      "updated inventory:\n",
+      "{'t-shirt': 6, 'mug': 6, 'hat': 7, 'book': 2, 'keychain': 4}\n"
+     ]
+    }
+   ],
+   "source": [
+    "def update_inventory (customer_orders, inventory):\n",
+    "    for item in customer_orders:\n",
+    "        if item in inventory:\n",
+    "            if inventory [item] >0:\n",
+    "               inventory [item] -=1\n",
+    "               print (f'{item}',\"uptaded now there's\",{inventory[item]},\"left in inventory\")\n",
+    "            else:\n",
+    "               print (f'{item}', \"is out of stock in inventory\")\n",
+    "        else:\n",
+    "            print (f'{item}', \"does not exist in inventory\")\n",
+    "    return (inventory)        \n",
     "\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.\n",
+    "inventory = update_inventory (customer_orders, inventory)\n",
     "\n",
-    "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.\n",
+    "print (\"updated inventory:\")\n",
+    "print (inventory)\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "788c8fd9",
+   "metadata": {},
+   "source": [
+    "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": 39,
+   "id": "24d8ae4e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def calculate_order_statistics (customer_orders , products):\n",
+    "    total_products_ordered = len(customer_orders)\n",
+    "    total_products_inventory = len (products)\n",
+    "    percentage_of_products_ordered = (total_products_ordered/total_products_inventory)*100\n",
+    "    return (total_products_ordered , percentage_of_products_ordered)\n",
+    "   "
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "e00e8c9d",
+   "metadata": {},
+   "source": [
+    "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": 40,
+   "id": "3b5646a1",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def print_order_statistics(order_statistics):\n",
+    "    total = order_statistics[0]\n",
+    "    percentage = order_statistics[1]\n",
     "\n",
+    "    print(\"Order Statistics:\")\n",
+    "    print(\"Total Products Ordered:\", total)\n",
+    "    print(\"Percentage of Products Ordered:\", percentage, \"%\")\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "08e6cdc7",
+   "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": 41,
+   "id": "215f42a2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def print_updated_inventory(inventory):\n",
+    "    print(\"Updated Inventory:\")\n",
+    "    for item, quantity in inventory.items():\n",
+    "        print(item, \":\", quantity)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "62793a38",
+   "metadata": {},
+   "source": [
     "7. Call the functions in the appropriate sequence to execute the program and manage customer orders.\n",
     "\n",
     "Hints for functions:\n",
     "\n",
     "- Consider the input parameters required for each function and their return values.\n",
     "- Utilize function parameters and return values to transfer data between functions.\n",
-    "- Test your functions individually to ensure they work correctly.\n",
+    "- Test your functions individually to ensure they work correctly."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 45,
+   "id": "f554cfe1",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "initial inventory\n",
+      "{'t-shirt': 6, 'mug': 7, 'hat': 8, 'book': 9, 'keychain': 4}\n",
+      "mug added to your order\n",
+      "iguana is not a product available\n",
+      "book added to your order\n",
+      "hat added to your order\n",
+      "book uptaded now there's {8} left in inventory\n",
+      "mug uptaded now there's {6} left in inventory\n",
+      "hat uptaded now there's {7} left in inventory\n",
+      "Order Statistics:\n",
+      "Total Products Ordered: 3\n",
+      "Percentage of Products Ordered: 60.0 %\n",
+      "Updated Inventory:\n",
+      "t-shirt : 6\n",
+      "mug : 6\n",
+      "hat : 7\n",
+      "book : 8\n",
+      "keychain : 4\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 1. List of products\n",
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
     "\n",
-    "\n"
+    "# 2. Initialize the inventory (the user enters the quantities)\n",
+    "inventory = initialize_inventory(products)\n",
+    "print (\"initial inventory\")\n",
+    "print (inventory)\n",
+    "\n",
+    "# 3. Get the customer's order\n",
+    "customer_orders = get_customer_orders()\n",
+    "\n",
+    "# 4. Update the inventory based on the customer's order\n",
+    "inventory = update_inventory(customer_orders, inventory)\n",
+    "\n",
+    "# 5. Calculate order statistics\n",
+    "order_stats = calculate_order_statistics(customer_orders, products)\n",
+    "\n",
+    "# 6. Print order statistics and updated inventory\n",
+    "print_order_statistics(order_stats)\n",
+    "print_updated_inventory(inventory)\n"
    ]
   }
  ],
@@ -61,7 +310,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.9.6"
   }
  },
  "nbformat": 4,