diff --git a/f22/meena_lec_notes/lec-16/lec_16_list_practice.ipynb b/f22/meena_lec_notes/lec-16/lec_16_list_practice.ipynb
index 4546693fb5181281013ade5a475a0d633a985dda..fa9aa93a1fa39ca707810f319e3499dc6ea2d339 100644
--- a/f22/meena_lec_notes/lec-16/lec_16_list_practice.ipynb
+++ b/f22/meena_lec_notes/lec-16/lec_16_list_practice.ipynb
@@ -1178,6 +1178,49 @@
     "## Self-practice"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "fd43b7b3",
+   "metadata": {},
+   "source": [
+    "### Function: `find_fav_locations_within(lat_min, lat_max, long_min, long_max)` "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "a403a92c",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def find_fav_locations_within(lat_min, lat_max, long_min, long_max):\n",
+    "    \"\"\"\n",
+    "    find_prices_within(lat_min, lat_max, long_min, long_max) returns a nested list.\n",
+    "    First inner list contains latitudes of favourite places within the geographical \n",
+    "    location between and including\n",
+    "    the latitudes lat_min and lat_max and longitudes long_min and long_max.\n",
+    "    Second inner list contains longitudes of favourite places within the geographical \n",
+    "    location between and including\n",
+    "    the latitudes lat_min and lat_max and longitudes long_min and long_max.\n",
+    "    \"\"\"\n",
+    "    pass"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "f2699919",
+   "metadata": {},
+   "source": [
+    "### What are the favourite places within United States?\n",
+    "\n",
+    "```\n",
+    "top = 49.3457868 # north lat\n",
+    "bottom =  24.7433195 # south lat\n",
+    "left = -124.7844079 # west long\n",
+    "right = -66.9513812 # east long\n",
+    "```"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "8ac26620",
diff --git a/f22/meena_lec_notes/lec-16/lec_16_list_practice_template.ipynb b/f22/meena_lec_notes/lec-16/lec_16_list_practice_template.ipynb
index a0247e399212badff06735b2b6815021377245ce..7f958a755ab04b451b20e851146c7405030da1eb 100644
--- a/f22/meena_lec_notes/lec-16/lec_16_list_practice_template.ipynb
+++ b/f22/meena_lec_notes/lec-16/lec_16_list_practice_template.ipynb
@@ -648,6 +648,49 @@
     "## Self-practice"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "fe5b9303",
+   "metadata": {},
+   "source": [
+    "### Function: `find_fav_locations_within(lat_min, lat_max, long_min, long_max)` "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f8443ad2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def find_fav_locations_within(lat_min, lat_max, long_min, long_max):\n",
+    "    \"\"\"\n",
+    "    find_prices_within(lat_min, lat_max, long_min, long_max) returns a nested list.\n",
+    "    First inner list contains latitudes of favourite places within the geographical \n",
+    "    location between and including\n",
+    "    the latitudes lat_min and lat_max and longitudes long_min and long_max.\n",
+    "    Second inner list contains longitudes of favourite places within the geographical \n",
+    "    location between and including\n",
+    "    the latitudes lat_min and lat_max and longitudes long_min and long_max.\n",
+    "    \"\"\"\n",
+    "    pass"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "4e0d63eb",
+   "metadata": {},
+   "source": [
+    "### What are the favourite places within United States?\n",
+    "\n",
+    "```\n",
+    "top = 49.3457868 # north lat\n",
+    "bottom =  24.7433195 # south lat\n",
+    "left = -124.7844079 # west long\n",
+    "right = -66.9513812 # east long\n",
+    "```"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "8ac26620",