diff --git a/SLEW_Case1_Electromagnetic_Phenomena.ipynb b/SLEW_Case1_Electromagnetic_Phenomena.ipynb
index ca3d54d5a7d9fe2bef3b2e67243304b307ba62bc..c750a6021726b7be2b70ed37ee3e4e3550facc3e 100644
--- a/SLEW_Case1_Electromagnetic_Phenomena.ipynb
+++ b/SLEW_Case1_Electromagnetic_Phenomena.ipynb
@@ -42,7 +42,8 @@
     "A round-rotor machine has the following values:\n",
     "- $X_{fd} = 0.1648$, $X_l = 0.15$, $X_d = 1.8099$, $X_q = 1.76$\n",
     "- $T'_{d_0} = 8.0669 s$, $T''_{d_0} = 0.03 s$, $T'_{q_0} = 0.9991 s$, $T''_{q_0} = 0.07 s$\n",
-    "- $X''_d = 0.2299$, $X'_q = 0.65$, $X''_q = 0.25$"
+    "- $X''_d = 0.2299$, $X'_q = 0.65$, $X''_q = 0.25$\n",
+    "- $f_n = 60 Hz$"
    ]
   },
   {
@@ -70,7 +71,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "**You can process the results from VILLASweb (as required in 2, 3b and 4b) using the prepared notebook cells below.**"
+    "**You can check your calculation solutions and process the results from VILLASweb using the prepared notebook cells below.**"
    ]
   },
   {
@@ -84,7 +85,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "#### First Setup your Python for post-processing"
+    "#### Setup your Python for post-processing"
    ]
   },
   {
@@ -108,10 +109,96 @@
     "from villas.dataprocessing.readtools import *\n",
     "from villas.dataprocessing.timeseries import *\n",
     "import matplotlib.pyplot as plt\n",
+    "import scipy.io as sio\n",
+    "outputs = sio.loadmat('outputs/output.mat', simplify_cells=True)\n",
     "\n",
     "%matplotlib widget"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "tags": []
+   },
+   "source": [
+    "### Subtask 1"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "*Calculate $X'_d$, $R_{fd}$, $X_{Dd}$ and $R_{Dd}$ from the given quantities (you can neglect the leakage inductance).*"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "To check your results, enter your solution for $X'_d$ rounded to 4 digits behind the comma:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "Xd_t=input('Xd_t:')\n",
+    "print('Your result is', 'correct!' if round(float(Xd_t),4)==round(outputs['Xd_t'],4) else 'incorrect. You should double-check your calculations.')"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "To check your results, enter your solution for $R_{fd}$ rounded to 4 digits behind the comma:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "Rfd=input('Rfd:')\n",
+    "print('Your result is', 'correct!' if round(float(Rfd),4)==round(outputs['Rfd'],4) else 'incorrect. You should double-check your calculations.')"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "To check your results, enter your solution for $X_{Dd}$ rounded to 4 digits behind the comma:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "XDd=input('XDd:')\n",
+    "print('Your result is', 'correct!' if round(float(XDd),4)==round(outputs['XDd'],4) else 'incorrect. You should double-check your calculations.')"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "To check your results, enter your solution for $R_{Dd}$ rounded to 4 digits behind the comma:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "RDd=input('RDd:')\n",
+    "print('Your result is', 'correct!' if round(float(RDd),4)==round(outputs['RDd'],4) else 'incorrect. You should double-check your calculations.')"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},
@@ -123,14 +210,16 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "#### Download simulation results from VILLASweb"
+    "*Apply $X'_d$ by adjusting *Ld_t* in VILLASweb and generate the corresponding short-circuit current plot.*"
    ]
   },
   {
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Enter your result download/import code snippet in the following cell:"
+    "Enter VILLASweb under [https://slew.rwth-aachen.de/](https://slew.rwth-aachen.de/).  \n",
+    "Adjust the parameter *Ld_t* and run a corresponding simulation. Further instructions on how to handle VILLASweb you can find in the [SLEW Platform Tutorial](./SLEW_Platform_Tutorial.ipynb).  \n",
+    "Then, enter your code snippet for result download in the following cell:"
    ]
   },
   {
@@ -190,21 +279,58 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "### Subtask 3b"
+    "### Subtask 3"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "*3. The open circuit time constant $T'_{do}$ shall be increased to $18s$  \n",
+    "  a.) Find the corresponding value of $R_{fd}$ that leads to that increase.  \n",
+    "  b.) Apply the new $T'_{do}$ by adjusting *Td0_t* in VILLASweb, run the simulation and observe the impact of such increase.*"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### a.)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "To check your results, enter your solution for $R_{fd}$ rounded to 7 digits behind the comma:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "Rfd_T3a=input('Rfd in Subtask 3:')\n",
+    "print('Your result is', 'correct!' if round(float(Rfd_T3a),7)==round(outputs['Rfd_T3a'],7) else 'incorrect. You should double-check your calculations.')"
    ]
   },
   {
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "#### Download simulation results from VILLASweb"
+    "### b.)"
    ]
   },
   {
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Enter your result download/import code snippet in the following cell:"
+    "Enter VILLASweb under [https://slew.rwth-aachen.de/](https://slew.rwth-aachen.de/).  \n",
+    "Adjust the parameter *Td0_t* and run a corresponding simulation. Further instructions on how to handle VILLASweb you can find in the [SLEW Platform Tutorial](./SLEW_Platform_Tutorial.ipynb).  \n",
+    "Then, enter your code snippet for result download in the following cell:"
    ]
   },
   {
@@ -265,21 +391,58 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "### Subtask 4b"
+    "### Subtask 4"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "*4. The open circuit time constant $T''_{do}$ shall be increased to $0.09s$  \n",
+    "  a.) Find the corresponding value of $R_{Dd}$ that leads to that increase.  \n",
+    "  b.) Reset $T'_{do}$ to its original value and apply the new $T''_{do}$ instead by adjusting *Td0_s* in VILLASweb, run the simulation and observe the impact of such increase.*  "
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### a.)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "To check your results, enter your solution for $R_{Dd}$ rounded to 4 digits behind the comma:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "RDd_T4a=input('RDd in Subtask 4:')\n",
+    "print('Your result is', 'correct!' if round(float(RDd_T4a),4)==round(outputs['RDd_T4a'],4) else 'incorrect. You should double-check your calculations.')"
    ]
   },
   {
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "#### Download simulation results from VILLASweb"
+    "### b.)"
    ]
   },
   {
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Enter your result download/import code snippet in the following cell:"
+    "Enter VILLASweb under [https://slew.rwth-aachen.de/](https://slew.rwth-aachen.de/).  \n",
+    "Adjust the parameter *Td0_s* and run a corresponding simulation. Further instructions on how to handle VILLASweb you can find in the [SLEW Platform Tutorial](./SLEW_Platform_Tutorial.ipynb).  \n",
+    "Then, enter your code snippet for result download in the following cell:"
    ]
   },
   {
@@ -335,13 +498,6 @@
     "    plt.legend(loc='upper right')\n",
     "plt.show()"
    ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
   }
  ],
  "metadata": {
diff --git a/outputs/output.mat b/outputs/output.mat
new file mode 100644
index 0000000000000000000000000000000000000000..b636be9a75073ca68393f88ec250bfcf6c3ce8bf
Binary files /dev/null and b/outputs/output.mat differ