diff --git a/442385_Nanda_Sisken_Assign_3.ipynb b/442385_Nanda_Sisken_Assign_3.ipynb
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+{
+  "nbformat": 4,
+  "nbformat_minor": 0,
+  "metadata": {
+    "colab": {
+      "provenance": [],
+      "collapsed_sections": []
+    },
+    "kernelspec": {
+      "name": "python3",
+      "display_name": "Python 3"
+    },
+    "language_info": {
+      "name": "python"
+    }
+  },
+  "cells": [
+    {
+      "cell_type": "code",
+      "source": [
+        "# Import Libraries\n",
+        "import numpy as np\n",
+        "import pandas as pd"
+      ],
+      "metadata": {
+        "id": "aDtFkeqAvLX2"
+      },
+      "execution_count": 132,
+      "outputs": []
+    },
+    {
+      "cell_type": "code",
+      "execution_count": 133,
+      "metadata": {
+        "id": "Letb52yp47Gb"
+      },
+      "outputs": [],
+      "source": [
+        "# Define RouthStability Class \n",
+        "class RouthStability():\n",
+        "  ## constructor takes string of coefficiens from polynomial\n",
+        "  def __init__(self, den):\n",
+        "    self.den = np.array([float(item) for item in den.split()])\n",
+        "    self.deg = len(self.den)\n",
+        "  ## append k as constant in array\n",
+        "  def set_k(self, k):\n",
+        "    self.den = np.append(self.den, float(k))\n",
+        "    self.deg += 1\n",
+        "  ## generate routh table and print its state\n",
+        "  def calc_routh(self):\n",
+        "    height = (self.deg+1)//2\n",
+        "    arr = np.zeros((height + 2,height))\n",
+        "    for index in range(self.deg):\n",
+        "      if index % 2 == 0:\n",
+        "        arr[0][index//2] = self.den[index]\n",
+        "      else:\n",
+        "        arr[1][(index-1)//2] = self.den[index]\n",
+        "\n",
+        "    for i in range(2, height+2):\n",
+        "      for j in range(height-1):\n",
+        "        arr[i][j] = (arr[i-1][0]*arr[i-2][j+1] - arr[i-2][0]*arr[i-1][j+1])//2\n",
+        "        arr[i][j] += 0\n",
+        "    \n",
+        "    self.df = pd.DataFrame(arr)\n",
+        "    self.show_tab()\n",
+        "    if self.is_stable() == True:\n",
+        "      print(\"SYSTEM IS STABLE\")\n",
+        "    else:\n",
+        "      print(\"SYSTEM IS UNSTABLE\")\n",
+        "  ## print generated route table\n",
+        "  def show_tab(self):\n",
+        "    print(self.df)\n",
+        "  ## return generated route DataFrame\n",
+        "  def get_table(self):\n",
+        "    return self.df\n",
+        "  ## return system stability as boolean\n",
+        "  def is_stable(self):\n",
+        "    flag = True\n",
+        "    for item in self.df[0]:\n",
+        "      if item < 0: flag = False\n",
+        "    return flag\n",
+        "  ## return the value of a polynomial\n",
+        "  def get_poly(self, x):\n",
+        "    total = 0\n",
+        "    for i in range(self.deg):\n",
+        "      total += self.den[self.deg-i-1]*(x**i)\n",
+        "      print(total)\n",
+        "    return total"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "# First Testing\n",
+        "den = input(\"Enter your polynomial: \")\n",
+        "k_in = input(\"Enter your K: \")\n",
+        "\n",
+        "rs = RouthStability(den)\n",
+        "rs.set_k(k_in)\n",
+        "rs.calc_routh()"
+      ],
+      "metadata": {
+        "id": "Je19fGrvtOu4",
+        "colab": {
+          "base_uri": "https://localhost:8080/"
+        },
+        "outputId": "c99b1159-f745-4c3f-c012-c2f464b8edb0"
+      },
+      "execution_count": 134,
+      "outputs": [
+        {
+          "output_type": "stream",
+          "name": "stdout",
+          "text": [
+            "Enter your polynomial: 1 2 3 4 5\n",
+            "Enter your K: 6\n",
+            "     0    1    2\n",
+            "0  1.0  3.0  5.0\n",
+            "1  2.0  4.0  6.0\n",
+            "2  1.0  2.0  0.0\n",
+            "3  0.0  3.0  0.0\n",
+            "4 -2.0  0.0  0.0\n",
+            "SYSTEM IS UNSTABLE\n"
+          ]
+        }
+      ]
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "# Second Testing\n",
+        "den = input(\"Enter your polynomial: \")\n",
+        "k_in = input(\"Enter your K: \")\n",
+        "\n",
+        "rs = RouthStability(den)\n",
+        "rs.set_k(k_in)\n",
+        "rs.calc_routh()"
+      ],
+      "metadata": {
+        "colab": {
+          "base_uri": "https://localhost:8080/"
+        },
+        "id": "kFgcxNcscafI",
+        "outputId": "25aadcc4-6a29-4c16-c992-46d95a56cbfb"
+      },
+      "execution_count": 136,
+      "outputs": [
+        {
+          "output_type": "stream",
+          "name": "stdout",
+          "text": [
+            "Enter your polynomial: 12 56 37 80\n",
+            "Enter your K: 17\n",
+            "           0      1     2\n",
+            "0       12.0   37.0  17.0\n",
+            "1       56.0   80.0   0.0\n",
+            "2      556.0  476.0   0.0\n",
+            "3     8912.0    0.0   0.0\n",
+            "4  2121056.0    0.0   0.0\n",
+            "SYSTEM IS STABLE\n"
+          ]
+        }
+      ]
+    },
+    {
+      "cell_type": "code",
+      "source": [
+        "# Third Testing\n",
+        "den = input(\"Enter your polynomial: \")\n",
+        "k_in = input(\"Enter your K: \")\n",
+        "\n",
+        "rs = RouthStability(den)\n",
+        "rs.set_k(k_in)\n",
+        "rs.calc_routh()"
+      ],
+      "metadata": {
+        "colab": {
+          "base_uri": "https://localhost:8080/"
+        },
+        "id": "jaif_A4_hfeJ",
+        "outputId": "0b387e7e-efbf-4f5c-fb45-d98489bbba3e"
+      },
+      "execution_count": 137,
+      "outputs": [
+        {
+          "output_type": "stream",
+          "name": "stdout",
+          "text": [
+            "Enter your polynomial: 1.2 6.81 7.31\n",
+            "Enter your K: 3.141\n",
+            "       0      1\n",
+            "0   1.20  7.310\n",
+            "1   6.81  3.141\n",
+            "2  23.00  0.000\n",
+            "3  36.00  0.000\n",
+            "SYSTEM IS STABLE\n"
+          ]
+        }
+      ]
+    },
+    {
+      "cell_type": "code",
+      "source": [],
+      "metadata": {
+        "id": "SjkQCR9chk6P"
+      },
+      "execution_count": null,
+      "outputs": []
+    }
+  ]
+}
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