diff --git a/lab-python-lambda-map-reduce-filter.ipynb b/lab-python-lambda-map-reduce-filter.ipynb
index 96c9781..f3c9d99 100644
--- a/lab-python-lambda-map-reduce-filter.ipynb
+++ b/lab-python-lambda-map-reduce-filter.ipynb
@@ -66,7 +66,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 10,
    "id": "08463071-9351-4d49-8d29-4fcb817fb177",
    "metadata": {},
    "outputs": [],
@@ -94,12 +94,14 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 11,
    "id": "0781335d-39cf-403d-b86a-ca908a09fe55",
    "metadata": {},
    "outputs": [],
    "source": [
-    "# your code goes here"
+    "# your code goes here\n",
+    "\n",
+    "debits = list(filter(lambda t: t[1] == 'debit', transactions))"
    ]
   },
   {
@@ -124,12 +126,25 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 12,
    "id": "25073469-7258-4fc6-b0a0-ef8ea57688fe",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[(-100, 'debit'), (-250, 'debit'), (-300, 'debit'), (-850, 'debit'), (-1200, 'debit')]\n"
+     ]
+    }
+   ],
    "source": [
-    "# your code goes here"
+    "# your code goes here\n",
+    "\n",
+    "sort_dec = lambda t: t[0]\n",
+    "sort_deb = sorted(debits, key = sort_dec, reverse=True)\n",
+    "\n",
+    "print(sort_deb)"
    ]
   },
   {
@@ -158,7 +173,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 13,
    "id": "e1de9d03-f029-4e2e-9733-ae92e3de7527",
    "metadata": {},
    "outputs": [],
@@ -169,12 +184,26 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 14,
    "id": "2f253b7e-5300-4819-b38f-9fc090554f51",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[105.0, 52.5, -26.25, 1050.0, -10.5]\n"
+     ]
+    }
+   ],
    "source": [
-    "# your code goes here"
+    "# your code goes here\n",
+    "\n",
+    "interest_rate = 0.05\n",
+    "\n",
+    "new_balances = list(map(lambda b: b * (1 + interest_rate), balances))\n",
+    "\n",
+    "print(new_balances)"
    ]
   },
   {
@@ -195,7 +224,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 15,
    "id": "69e24c3b-385e-44d6-a8ed-705a3f58e696",
    "metadata": {},
    "outputs": [],
@@ -209,12 +238,27 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 16,
    "id": "0906a9b0-d567-4786-96f2-5755611b885e",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[{'balance': 1020.0, 'interest_rate': 0.02}, {'balance': 2020.0, 'interest_rate': 0.01}, {'balance': 515.0, 'interest_rate': 0.03}]\n"
+     ]
+    }
+   ],
    "source": [
-    "# your code goes here\n"
+    "# your code goes here\n",
+    "def apply_interest(account):\n",
+    "    new_balance = account['balance'] * (1 + account['interest_rate'])\n",
+    "    return {'balance': new_balance, 'interest_rate': account['interest_rate']}\n",
+    "\n",
+    "updated_accounts = list(map(apply_interest, accounts))\n",
+    "\n",
+    "print(updated_accounts)"
    ]
   },
   {
@@ -243,14 +287,30 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 17,
    "id": "6284dbd3-e117-411e-8087-352be6deaed4",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "-36.75\n"
+     ]
+    }
+   ],
    "source": [
     "from functools import reduce\n",
     "\n",
-    "# your code goes here"
+    "# your code goes here\n",
+    "\n",
+    "balances = [105.0, 52.5, -26.25, 1050.0, -10.5]\n",
+    "\n",
+    "negative_balances = list(filter(lambda b: b < 0, balances))\n",
+    "\n",
+    "total_negative = reduce(lambda x, y: x + y, negative_balances)\n",
+    "\n",
+    "print(total_negative)"
    ]
   },
   {
@@ -273,10 +333,18 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 18,
    "id": "da2264b5-298e-4b45-99df-852b94e90d15",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[650, 1600, 275]\n"
+     ]
+    }
+   ],
    "source": [
     "accounts = [\n",
     "    {'balance': 1000, 'withdrawals': [100, 50, 200]},\n",
@@ -284,13 +352,20 @@
     "    {'balance': 500, 'withdrawals': [50, 100, 75]},\n",
     "]\n",
     "\n",
-    "# your code goes here\n"
+    "# your code goes here\n",
+    "def calculate_balance(account):\n",
+    "    total_withdrawals = sum(account['withdrawals'])\n",
+    "    return account['balance'] - total_withdrawals\n",
+    "\n",
+    "remaining_balances = list(map(calculate_balance, accounts))\n",
+    "\n",
+    "print(remaining_balances)"
    ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "base",
    "language": "python",
    "name": "python3"
   },
@@ -304,7 +379,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.9"
   }
  },
  "nbformat": 4,