diff --git a/lab-python-oop.ipynb b/lab-python-oop.ipynb
index c13bc58..39a67fc 100644
--- a/lab-python-oop.ipynb
+++ b/lab-python-oop.ipynb
@@ -56,21 +56,66 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 165,
    "id": "21625526-3fae-4c55-bab5-f91940070681",
    "metadata": {},
    "outputs": [],
    "source": [
     "# your code goes here\n",
-    "\n"
+    "class BankAccount:\n",
+    "    account_count=0\n",
+    "    account_numbers=[]\n",
+    "    def __init__(self,balance=0):\n",
+    "        # if account_num in BankAccount.account_numbers:\n",
+    "        #     print('Account Already exists, we have created a new account, account number ',(account_num+1))\n",
+    "        #     self.account_number = account_num+1\n",
+    "        #     #raise TypeError\n",
+    "        # else: \n",
+    "        #     self.account_number = account_num\n",
+    "        if not BankAccount.account_numbers:\n",
+    "            self.account_number=1\n",
+    "            BankAccount.account_numbers.append(self.account_number)\n",
+    "        else:\n",
+    "            self.account_number=BankAccount.account_numbers[-1]+1\n",
+    "            BankAccount.account_numbers.append(self.account_number)\n",
+    "        self.balance=balance\n",
+    "        BankAccount.account_count += 1\n",
+    "        #BankAccount.account_numbers.append(account_num)\n",
+    "    def deposit(self,amount):\n",
+    "        self.balance=self.balance+amount\n",
+    "        return self.balance+amount\n",
+    "    def withdraw(self,amount):\n",
+    "        if self.balance>=amount:\n",
+    "            self.balance = self.balance-amount\n",
+    "            return self.balance\n",
+    "        else:\n",
+    "            print('Insufficient funds')\n",
+    "    def get_balance(self):\n",
+    "        return self.balance\n",
+    "    def get_account_number(self):\n",
+    "        return self.account_number\n"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 195,
    "id": "ee789466-d4cf-4dd8-b742-6863d42c3e5c",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Account 1 balance: 1000\n",
+      "Account 1 number: 10\n",
+      "Account 2 balance: 500\n",
+      "Account 2 number: 11\n",
+      "Account 1 balance after transactions: 1300\n",
+      "Insufficient funds\n",
+      "Account 2 balance after transactions: 500\n"
+     ]
+    }
+   ],
    "source": [
     "# Testing the BankAccount class\n",
     "# Creating two instances of the BankAccount class with initial balances of 1000 and 500\n",
@@ -117,12 +162,21 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 181,
    "id": "4f8848b5-05d3-4259-9e24-914537926778",
    "metadata": {},
    "outputs": [],
    "source": [
-    "# your code goes here"
+    "# your code goes here\n",
+    "class SavingsAccount(BankAccount):\n",
+    "    def __init__(self, balance=0,interest_rate=0.01):\n",
+    "        super().__init__(balance)\n",
+    "        self.interest_rate=interest_rate\n",
+    "    def add_interest(self):\n",
+    "        self.balance = self.balance+self.balance*self.interest_rate\n",
+    "        return self.balance\n",
+    "    def get_interest_rate(self):\n",
+    "        return self.interest_rate"
    ]
   },
   {
@@ -151,12 +205,32 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 182,
    "id": "bccc7f6d-d58c-4909-9314-aaf4afc1cd30",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Current balance:  127.5\n",
+      "Interest rate:  0.02\n"
+     ]
+    }
+   ],
    "source": [
-    "# your code goes here"
+    "# your code goes here\n",
+    "acc1=SavingsAccount(100,0.02)\n",
+    "acc1.deposit(50)\n",
+    "#print('balance is ',acc1.balance)\n",
+    "acc1.withdraw(25)\n",
+    "#print('balance is ',acc1.balance)\n",
+    "acc1.add_interest()\n",
+    "#print('balance is ',acc1.balance)\n",
+    "acc1.get_balance()\n",
+    "print('Current balance: ',acc1.balance)\n",
+    "int_rate=acc1.get_interest_rate()\n",
+    "print('Interest rate: ',(int_rate))\n"
    ]
   },
   {
@@ -189,12 +263,43 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "id": "3c883c6e-3cb8-4043-92d3-12409668a28e",
+   "execution_count": 194,
+   "id": "9a4b422e-301a-4576-a392-1bbf4f609db7",
    "metadata": {},
    "outputs": [],
    "source": [
-    "# your code goes here"
+    "# your code goes here\n",
+    "class CheckingAccount(BankAccount):\n",
+    "    \n",
+    "    def __init__(self,balance=0,transaction_fee=1, transaction_count=0):\n",
+    "        super().__init__(balance)\n",
+    "        self.transaction_fee = transaction_fee\n",
+    "        self.transaction_count = transaction_count\n",
+    "\n",
+    "    def deposit(self,amount):\n",
+    "        self.transaction_count+=1\n",
+    "        new_balance = super().deposit(amount)\n",
+    "        return new_balance\n",
+    "\n",
+    "    def withdraw(self,amount):\n",
+    "        self.transaction_count+=1\n",
+    "        new_balance = super().withdraw(amount)\n",
+    "        return new_balance\n",
+    "\n",
+    "    def deduct_fees(self):\n",
+    "        resulting_balance = self.balance-self.transaction_count*self.transaction_fee\n",
+    "        if resulting_balance>=0:\n",
+    "            self.balance = resulting_balance\n",
+    "            print(f\"We have deducted ${self.transaction_count*self.transaction_fee} from your account\")\n",
+    "            self.transaction_count = 0\n",
+    "        else:\n",
+    "            print(\"Error: Insufficient funds\")\n",
+    "\n",
+    "    def reset_transactions(self):\n",
+    "        self.transaction_count = 0\n",
+    "\n",
+    "    def get_transaction_count(self):\n",
+    "        return self.transaction_count"
    ]
   },
   {
@@ -234,12 +339,40 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "id": "faa5b148-c11b-4be0-b810-de8a7da81451",
+   "execution_count": 193,
+   "id": "2223acbb-53da-49da-86df-95797ea4e899",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "We have deducted $4 from your account\n",
+      "Current balance:  546\n",
+      "Transaction count:  0\n",
+      "We have deducted $4 from your account\n",
+      "Current balance:  667\n",
+      "Transaction count:  0\n"
+     ]
+    }
+   ],
    "source": [
-    "# your code goes here"
+    "# your code goes here\n",
+    "acc3=CheckingAccount(500,2)\n",
+    "acc3.deposit(100)\n",
+    "acc3.withdraw(50)\n",
+    "acc3.deduct_fees()\n",
+    "new_bal=acc3.get_balance()\n",
+    "transact_count=acc3.get_transaction_count()\n",
+    "print('Current balance: ',(new_bal))\n",
+    "print('Transaction count: ',(transact_count))\n",
+    "acc3.deposit(200)\n",
+    "acc3.withdraw(75)\n",
+    "acc3.deduct_fees()\n",
+    "new_bal=acc3.get_balance()\n",
+    "transact_count=acc3.get_transaction_count()\n",
+    "print('Current balance: ',(new_bal))\n",
+    "print('Transaction count: ',(transact_count))"
    ]
   }
  ],
@@ -259,7 +392,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.9"
   }
  },
  "nbformat": 4,