diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index 3e50ef8..da23fbf 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -41,18 +41,148 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 11,
    "id": "cc2c441d-9dcf-4817-b097-cf6cbe440846",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Enter a valid value\n",
+      "0.6\n",
+      "5.2\n",
+      "Can not divide by zero\n"
+     ]
+    }
+   ],
    "source": [
-    "# your code goes here"
+    "# your code goes here\n",
+    "\n",
+    "def addition(a: float, b:float) -> float:\n",
+    "    return round(a+b, 1)\n",
+    "\n",
+    "def subtraction(a: float, b:float) -> float:\n",
+    "    return round(a-b, 1)\n",
+    "\n",
+    "def multiplication(a: float, b:float) -> float:\n",
+    "    return round(a*b, 1)\n",
+    "\n",
+    "def division(a: float, b:float) -> float:\n",
+    "    return round(a/b, 1)\n",
+    "\n",
+    "def calculate(a: float, b: float, operand: str) -> float:\n",
+    "    try:\n",
+    "        while True:\n",
+    "            if operand == \"+\":\n",
+    "                result = addition(a, b)\n",
+    "                return result\n",
+    "            elif operand == \"-\":\n",
+    "                result = subtraction(a, b)\n",
+    "                return result\n",
+    "            elif operand == \"*\":\n",
+    "                result = multiplication(a, b)\n",
+    "                return result\n",
+    "            elif operand == \"/\":\n",
+    "                if b == 0:\n",
+    "                    raise ZeroDivisionError\n",
+    "                else:\n",
+    "                    result = division(a, b)\n",
+    "                    return result\n",
+    "            else:\n",
+    "                print(\"Enter a valid operator\") \n",
+    "    except ZeroDivisionError:\n",
+    "        return(\"Can not divide by zero\")\n",
+    "    except:\n",
+    "        return(\"Enter a valid value\")\n",
+    "\n",
+    "print(calculate(2.6,\"a\",\"+\"))\n",
+    "print(calculate(2.6,2,\"-\"))\n",
+    "print(calculate(2.6,2,\"*\"))\n",
+    "print(calculate(2.6,0,\"/\"))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "19ecaea2",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "16.6\n",
+      "-11.4\n",
+      "Enter a valid value\n",
+      "Division by zero is not possible\n",
+      "Enter a valid operator\n"
+     ]
+    }
+   ],
+   "source": [
+    "# your code goes here\n",
+    "\n",
+    "def addition(*args) -> float:\n",
+    "    try:\n",
+    "        result = args[0]\n",
+    "        for num in args[1:]:\n",
+    "            result +=  num\n",
+    "        return round(result,1)\n",
+    "    except TypeError:\n",
+    "        return \"Enter a valid value\"\n",
+    "\n",
+    "def subtraction(*args) -> float:\n",
+    "    try:\n",
+    "        result = args[0]\n",
+    "        for num in args[1:]:\n",
+    "            result-=num\n",
+    "        return round(result,1)\n",
+    "    except TypeError:\n",
+    "        return \"Enter a valid value\"\n",
+    "\n",
+    "def multiplication(*args) -> float:\n",
+    "    try:\n",
+    "        result = args[0]\n",
+    "        for num in args[1:]:\n",
+    "            result*=num\n",
+    "        return round(result,1)\n",
+    "    except TypeError:\n",
+    "        return \"Enter a valid value\"\n",
+    "\n",
+    "def division(*args) -> float:\n",
+    "    try:\n",
+    "        result = args[0]\n",
+    "        for num in args[1:]:\n",
+    "            result/=num\n",
+    "        return round(result,3)\n",
+    "    except ZeroDivisionError:\n",
+    "        return \"Division by zero is not possible\"\n",
+    "\n",
+    "def calculate(*args) -> float:\n",
+    "    if args[-1] == \"+\":\n",
+    "        return addition(*args[:-1])\n",
+    "    elif args[-1] == \"-\":\n",
+    "        return subtraction(*args[:-1])\n",
+    "    elif args[-1] == \"*\":\n",
+    "        return multiplication(*args[:-1])\n",
+    "    elif args[-1] == \"/\":\n",
+    "        return division(*args[:-1])\n",
+    "    else:\n",
+    "        return \"Enter a valid operator\"\n",
+    "    \n",
+    "\n",
+    "print(calculate(2.6,2,3,4,5,\"+\"))\n",
+    "print(calculate(2.6,2,3,4,5,\"-\"))\n",
+    "print(calculate(2.6,2,\"3\",4,5,\"*\"))\n",
+    "print(calculate(2.6,2,0,4,5,\"/\"))\n",
+    "print(calculate(2.6,2,3,4,5,\"9\"))\n"
    ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "Python 3",
    "language": "python",
    "name": "python3"
   },
@@ -66,7 +196,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.2"
   }
  },
  "nbformat": 4,