diff --git a/task-1/book.js b/task-1/book.js
index 8b49ecc..eb069c4 100644
--- a/task-1/book.js
+++ b/task-1/book.js
@@ -1,3 +1,21 @@
-function isBookApplicable(searchString) {
-  // Your code here
+function isBookApplicable(searchString) { 
+    const titleOfbook ="The fundamentals of JavaScript";
+
+    const titleLowerCase = titleOfbook.toLowerCase();
+    return titleLowerCase.includes(searchString.trim().toLowerCase());
 }
+
+console.log(isBookApplicable("javascript"));
+// Output: true
+
+console.log(isBookApplicable("javascript "));
+// Output: true
+
+console.log(isBookApplicable("python"));
+// Output: false
+
+console.log(isBookApplicable("JavaScript"));
+// Output: true
+
+console.log(isBookApplicable("JAVASCRIPT"));
+// Output: true
\ No newline at end of file
diff --git a/task-2/parse-date.js b/task-2/parse-date.js
index 877a3aa..ffe3493 100644
--- a/task-2/parse-date.js
+++ b/task-2/parse-date.js
@@ -1 +1,31 @@
 // Your code here
+function parseDateString(dateString) {
+    //const format_MDY = "MDY 10-21-1983";
+    //const format_DMY = "DMY 21-10-1983";
+    if (dateString.includes("MDY")) {
+        const parts = dateString.split(" ")[1].split("-");
+        //Format: MM-DD-YYYY
+        const month = parts[0];
+        const day = parts[1];
+        const year = parts[2];
+        return { day, month, year };
+    } else if (dateString.includes("DMY")) {
+        //Format: DD-MM-YYYY
+        const parts = dateString.split(" ")[1].split("-");
+        const month = parts[1];
+        const day = parts[0];
+        const year = parts[2];
+        return { day, month, year };
+    }
+}
+console.log(parseDateString("MDY 10-1-1983"));
+// Output: { day: 1, month: 10, year: 1983 }
+
+console.log(parseDateString("DMY 21-10-1983"));
+// Output: { day: 21, month: 10, year: 1983 }
+
+console.log(parseDateString("MDY 03-15-2024"));
+// Output: { day: 15, month: 3, year: 2024 }
+
+console.log(parseDateString("DMY 15-03-2024"));
+// Output: { day: 15, month: 3, year: 2024 }
\ No newline at end of file
diff --git a/task-3/date.js b/task-3/date.js
new file mode 100644
index 0000000..fabf697
--- /dev/null
+++ b/task-3/date.js
@@ -0,0 +1,18 @@
+export function convertHoursToMinutes(h){
+    return h * 60;
+}
+export function convertMinutesToHours(m){
+    return m / 60;
+}
+export function convertDaysToHours(d){
+    return d * 24;
+}
+export function convertHoursToDays(h){
+    return h / 24;
+}
+export function convertMinutesToSeconds(m){
+    return m * 60;
+}
+export function convertSecondsToMinutes(s){
+    return s / 60;
+}
\ No newline at end of file
diff --git a/task-4/cleanup.js b/task-4/cleanup.js
index 207523a..406661c 100644
--- a/task-4/cleanup.js
+++ b/task-4/cleanup.js
@@ -1,80 +1,45 @@
-// Temperature conversion and weather report for City 1
+// Temperature conversion and weather report for City 1 and 2 and 3.
 let cityName1 = "Amsterdam";
 let tempCelsius1 = 22;
-let tempFahrenheit1 = (tempCelsius1 * 9 / 5) + 32;
-let tempKelvin1 = tempCelsius1 + 273.15;
-console.log("Weather Report for " + cityName1);
-console.log("Temperature: " + tempCelsius1 + "°C");
-console.log("Temperature: " + tempFahrenheit1 + "°F");
-console.log("Temperature: " + tempKelvin1 + "K");
-if (tempCelsius1 < 0) {
-  console.log("Status: Freezing");
-} else if (tempCelsius1 >= 0 && tempCelsius1 < 10) {
-  console.log("Status: Cold");
-} else if (tempCelsius1 >= 10 && tempCelsius1 < 20) {
-  console.log("Status: Mild");
-} else if (tempCelsius1 >= 20 && tempCelsius1 < 30) {
-  console.log("Status: Warm");
-} else {
-  console.log("Status: Hot");
-}
-console.log("---");
-
-// Temperature conversion and weather report for City 2
+let windSpeed1 = 15;
 let cityName2 = "Berlin";
 let tempCelsius2 = 15;
-let tempFahrenheit2 = (tempCelsius2 * 9 / 5) + 32;
-let tempKelvin2 = tempCelsius2 + 273.15;
-console.log("Weather Report for " + cityName2);
-console.log("Temperature: " + tempCelsius2 + "°C");
-console.log("Temperature: " + tempFahrenheit2 + "°F");
-console.log("Temperature: " + tempKelvin2 + "K");
-if (tempCelsius2 < 0) {
-  console.log("Status: Freezing");
-} else if (tempCelsius2 >= 0 && tempCelsius2 < 10) {
-  console.log("Status: Cold");
-} else if (tempCelsius2 >= 10 && tempCelsius2 < 20) {
-  console.log("Status: Mild");
-} else if (tempCelsius2 >= 20 && tempCelsius2 < 30) {
-  console.log("Status: Warm");
-} else {
-  console.log("Status: Hot");
-}
-console.log("---");
-
-// Temperature conversion and weather report for City 3
+let windSpeed2 = 20;
 let cityName3 = "Copenhagen";
 let tempCelsius3 = -5;
-let tempFahrenheit3 = (tempCelsius3 * 9 / 5) + 32;
-let tempKelvin3 = tempCelsius3 + 273.15;
-console.log("Weather Report for " + cityName3);
-console.log("Temperature: " + tempCelsius3 + "°C");
-console.log("Temperature: " + tempFahrenheit3 + "°F");
-console.log("Temperature: " + tempKelvin3 + "K");
-if (tempCelsius3 < 0) {
-  console.log("Status: Freezing");
-} else if (tempCelsius3 >= 0 && tempCelsius3 < 10) {
-  console.log("Status: Cold");
-} else if (tempCelsius3 >= 10 && tempCelsius3 < 20) {
-  console.log("Status: Mild");
-} else if (tempCelsius3 >= 20 && tempCelsius3 < 30) {
-  console.log("Status: Warm");
+let windSpeed3 = 25;
+function tempFahrenheit(tempCelsius){
+  return (tempCelsius * 9 / 5) + 32;
+}
+function tempKelvin(tempCelsius){
+  return tempCelsius + 273.15;
+}
+function weatherCondition(tempCelsius){
+if (tempCelsius < 0) {
+  return "Freezing";
+} else if (tempCelsius >= 0 && tempCelsius < 10) {
+  return "Cold";
+} else if (tempCelsius >= 10 && tempCelsius < 20) {
+  return "Mild";
+} else if (tempCelsius >= 20 && tempCelsius < 30) {
+  return "Warm";
 } else {
-  console.log("Status: Hot");
+  return "Hot";
+}}
+function windChill(tempCelsius, windSpeed){
+  return 13.12 + 0.6215 * tempCelsius - 11.37 * Math.pow(windSpeed, 0.16) + 0.3965 * tempCelsius * Math.pow(windSpeed, 0.16);
+}
+function weatherReport(cityName, tempCelsius, windSpeed) {
+  console.log("Weather Report for " + cityName);
+  console.log("Temperature: " + tempCelsius + "°C");
+  console.log("Temperature: " + tempFahrenheit(tempCelsius) + "°F");
+  console.log("Temperature: " + tempKelvin(tempCelsius) + "K");
+  console.log("Status: " + weatherCondition(tempCelsius));
+  console.log("Wind chill in " + cityName + ": " + windChill(tempCelsius, windSpeed).toFixed(2) + "°C");
+  console.log("---");
 }
+weatherReport(cityName1, tempCelsius1, windSpeed1);
 console.log("---");
-
-// Wind chill calculation for City 1
-let windSpeed1 = 15;
-let windChill1 = 13.12 + 0.6215 * tempCelsius1 - 11.37 * Math.pow(windSpeed1, 0.16) + 0.3965 * tempCelsius1 * Math.pow(windSpeed1, 0.16);
-console.log("Wind chill in " + cityName1 + ": " + windChill1.toFixed(2) + "°C");
-
-// Wind chill calculation for City 2
-let windSpeed2 = 20;
-let windChill2 = 13.12 + 0.6215 * tempCelsius2 - 11.37 * Math.pow(windSpeed2, 0.16) + 0.3965 * tempCelsius2 * Math.pow(windSpeed2, 0.16);
-console.log("Wind chill in " + cityName2 + ": " + windChill2.toFixed(2) + "°C");
-
-// Wind chill calculation for City 3
-let windSpeed3 = 25;
-let windChill3 = 13.12 + 0.6215 * tempCelsius3 - 11.37 * Math.pow(windSpeed3, 0.16) + 0.3965 * tempCelsius3 * Math.pow(windSpeed3, 0.16);
-console.log("Wind chill in " + cityName3 + ": " + windChill3.toFixed(2) + "°C");
\ No newline at end of file
+weatherReport(cityName2, tempCelsius2, windSpeed2);
+console.log("---");
+weatherReport(cityName3, tempCelsius3, windSpeed3);