diff --git a/multiprocessing/multiprocessing_exercise_0.ipynb b/multiprocessing/multiprocessing_exercise_0.ipynb
index 124f889..e4be799 100644
--- a/multiprocessing/multiprocessing_exercise_0.ipynb
+++ b/multiprocessing/multiprocessing_exercise_0.ipynb
@@ -12,13 +12,23 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 4,
    "id": "656b87a0",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[0, 1, 8, 27, 64, 125, 216, 343, 512, 729]\n"
+     ]
+    }
+   ],
    "source": [
     "inputs = range(10)\n",
-    "... # TODO compute cubes\n",
+    "results = []\n",
+    "for i in inputs:\n",
+    "    results.append(i ** 3)\n",
     "print(results)"
    ]
   },
@@ -33,15 +43,31 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 3,
    "id": "b3e934a0",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[0, 1, 8, 27, 64, 125, 216, 343, 512, 729]\n"
+     ]
+    }
+   ],
    "source": [
     "inputs = range(10)\n",
-    "... # TODO compute cubes\n",
+    "results = list(map(lambda x: x ** 3, inputs))\n",
     "print(results)"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d246d75b",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
@@ -60,7 +86,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.4"
+   "version": "3.11.4"
   }
  },
  "nbformat": 4,
diff --git a/multiprocessing/multiprocessing_exercise_1.ipynb b/multiprocessing/multiprocessing_exercise_1.ipynb
index 0121800..d22abdc 100644
--- a/multiprocessing/multiprocessing_exercise_1.ipynb
+++ b/multiprocessing/multiprocessing_exercise_1.ipynb
@@ -12,7 +12,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 8,
    "id": "c6b53bbb",
    "metadata": {},
    "outputs": [],
@@ -23,6 +23,7 @@
     "        dx = (b - a) / n\n",
     "        x = a + (i + 0.5) * dx\n",
     "        y = f(x)\n",
+    "        # s.append(y * dx)\n",
     "        s = s + [y * dx]\n",
     "    return sum(s)\n",
     "\n",
@@ -51,14 +52,24 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 9,
    "id": "8f545181",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[1.666661031407557e-09, 2.6666113761564247e-10, 6.666600604887662e-11, 2.96227486984435e-11]\n",
+      "CPU times: user 33.3 s, sys: 49.2 ms, total: 33.3 s\n",
+      "Wall time: 33.9 s\n"
+     ]
+    }
+   ],
    "source": [
     "%%time\n",
     "ns = [10000, 25000, 50000, 75000]\n",
-    "... # TODO use a for loop\n",
+    "errors = [compute_error(n) for n in ns]\n",
     "print(errors)"
    ]
   },
@@ -76,7 +87,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 3,
    "id": "5a94fd97",
    "metadata": {},
    "outputs": [],
@@ -86,15 +97,34 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 10,
    "id": "479aee0f",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[1.666661031407557e-09, 2.6666113761564247e-10, 6.666600604887662e-11, 2.96227486984435e-11]\n",
+      "CPU times: user 7.63 ms, sys: 27.9 ms, total: 35.6 ms\n",
+      "Wall time: 29 s\n"
+     ]
+    }
+   ],
    "source": [
     "%%time\n",
-    "... # TODO use the `ProcessPool`\n",
+    "with ProcessPool(processes=4) as pool:\n",
+    "    errors = pool.map(compute_error, ns)\n",
     "print(errors)"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "fcf84dcb",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
@@ -113,7 +143,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.4"
+   "version": "3.11.4"
   }
  },
  "nbformat": 4,