diff --git a/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/App.tsx b/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/App.tsx
index 488bc934..4ef3dd7e 100644
--- a/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/App.tsx
+++ b/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/App.tsx
@@ -1,12 +1,63 @@
+import { useReducer, useState } from "react";
+
 import BatteryInput from "~/components/batteryInput";
 import Header from "~/components/header";
+import Messages from "~/components/messages";
 import SpeedInput from "~/components/speedInput";
 import WeatherInput from "~/components/weatherInput";
 
 const App = () => {
+  const initialState = {
+    speed: null,
+    battery: null,
+    weather: 50,
+    range: null,
+  };
+
+  const reducer = (state, action) => {
+    switch (action.type) {
+      case "setSpeed":
+        return { ...state, speed: action.payload, range: null };
+      case "setBattery":
+        return { ...state, battery: action.payload, range: null };
+      case "setWeather":
+        return { ...state, weather: action.payload, range: null };
+      case "setRange":
+        return { ...state, range: action.payload };
+      default:
+        throw "Unknown type error";
+    }
+  };
+
+  const [state, dispatch] = useReducer(reducer, initialState);
+  const [messages, setMessages] = useState([]);
+
   const calculateRange = () => {
-    return;
-  }
+    if (checkErrors()) return;
+
+    // s = speed, b = battery percentage w = weather
+    // if s=1, b=2, w=50 then range=57.9992
+    let s = state.speed,
+      b = state.battery,
+      w = state.weather;
+    let range = -((s * s * b) / 2500) + 4 * b + w;
+    dispatch({ type: "setRange", payload: range });
+  };
+
+  const checkErrors = () => {
+    let messages = [];
+
+    if (state.speed == null) messages.push("Speed is required");
+    if (state.battery == null) messages.push("Battery is required");
+    if (state.speed < 0 || state.speed > 90)
+      messages.push("The speed should be within a range of 0 and 90");
+    if (state.battery < 0 || state.battery > 100)
+      messages.push(
+        "The battery percentage should be within a range of 0 and 100",
+      );
+    setMessages(messages);
+    return messages.length !== 0;
+  };
 
   return (
     <div className="h-screen w-screen bg-[#212121]">
@@ -14,12 +65,30 @@ const App = () => {
         <Header />
         <form name="simulator" className="flex w-full flex-col items-center">
           <div className="mb-4 flex w-full flex-col items-center gap-y-4">
-            <SpeedInput />
-            <BatteryInput />
+            <SpeedInput dispatch={dispatch} />
+            <BatteryInput dispatch={dispatch} />
           </div>
           <div className="flex w-full flex-row justify-center gap-4">
-            <WeatherInput />
+            <WeatherInput state={state} dispatch={dispatch} />
+          </div>
+
+          <div className="my-4 flex flex-row rounded bg-blue-500 hover:bg-blue-600">
+            <button
+              type="button"
+              className="flex items-center justify-center p-3 text-white"
+              onClick={calculateRange}
+            >
+              Calculate
+            </button>
+          </div>
+
+          <div className="text-black">
+            {state.range &&
+              `The predicted range of the Eylsia is ${state.range} km.`}
           </div>
+          {/* {messages &&
+              messages.map((message, index) => <li key={index}>{message}</li>)} */}
+          {messages.length !== 0 && <Messages messages={messages} />}
         </form>
       </div>
     </div>
diff --git a/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/components/batteryInput/index.tsx b/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/components/batteryInput/index.tsx
index ca4586c0..bf235148 100644
--- a/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/components/batteryInput/index.tsx
+++ b/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/components/batteryInput/index.tsx
@@ -1,4 +1,4 @@
-const BatteryInput = () => {
+const BatteryInput = ({ dispatch }) => {
   return (
     <div className="flex w-full flex-col items-center gap-2">
       <label>Battery Percentage (%):</label>
@@ -8,6 +8,11 @@ const BatteryInput = () => {
         name="battery"
         type="number"
         placeholder="Battery"
+        onChange={(e) => {
+          const batteryValue =
+            e.target.value !== "" ? parseInt(e.target.value) : null;
+          dispatch({ type: "setBattery", payload: batteryValue });
+        }}
       />
     </div>
   );
diff --git a/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/components/messages/index.tsx b/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/components/messages/index.tsx
new file mode 100644
index 00000000..e856b479
--- /dev/null
+++ b/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/components/messages/index.tsx
@@ -0,0 +1,14 @@
+const Messages = ({ messages }) => {
+  return (
+    <div className="mb-3 rounded bg-gray-200 px-4 py-2 text-red-500">
+      <span className="text-xl font-bold">Errors:</span>
+      {messages.map((message, index) => (
+        <li key={index} className="list-none">
+          {message}
+        </li>
+      ))}
+    </div>
+  );
+};
+
+export default Messages;
diff --git a/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/components/speedInput/index.tsx b/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/components/speedInput/index.tsx
index aa381c14..9dc57799 100644
--- a/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/components/speedInput/index.tsx
+++ b/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/components/speedInput/index.tsx
@@ -1,4 +1,4 @@
-const SpeedInput = () => {
+const SpeedInput = ({ dispatch }) => {
   return (
     <>
       <div className="flex w-full flex-col items-center gap-2">
@@ -9,6 +9,11 @@ const SpeedInput = () => {
           name="speed"
           type="number"
           placeholder="Speed"
+          onChange={(e) => {
+            const speedValue =
+              e.target.value !== "" ? parseInt(e.target.value) : null;
+            dispatch({ type: "setSpeed", payload: speedValue });
+          }}
         />
       </div>
     </>
diff --git a/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/components/weatherInput/index.tsx b/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/components/weatherInput/index.tsx
index fd5ad35b..1067eb6f 100644
--- a/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/components/weatherInput/index.tsx
+++ b/Recruit-Training/Advanced-Recruit-Training/Telemetry-Teaser/src/components/weatherInput/index.tsx
@@ -1,4 +1,4 @@
-const WeatherInput = () => {
+const WeatherInput = ({ state, dispatch }) => {
   return (
     <>
       <img src="/Cloud.png" height="66px" width="66px" alt="Cloud" />
@@ -8,7 +8,12 @@ const WeatherInput = () => {
         type="range"
         min="0"
         max="100"
-        value="50"
+        value={state.weather}
+        onChange={(e) => {
+          const weatherValue =
+            e.target.value !== "" ? parseInt(e.target.value) : null;
+          dispatch({ type: "setWeather", payload: weatherValue });
+        }}
       />
       <img src="/Sun.png" height="66px" width="66px" alt="Sun" />
     </>