diff --git a/task-1/book.js b/task-1/book.js
index 8b49ecc..68afdce 100644
--- a/task-1/book.js
+++ b/task-1/book.js
@@ -1,3 +1,19 @@
 function isBookApplicable(searchString) {
-  // Your code here
+  
+  const bookTitle = "The fundamentals of JavaScript";
+  const normalizedTitle = bookTitle.toLowerCase();
+  const normalizedSearch = searchString.trim().toLowerCase();
+
+  if (normalizedTitle.includes(normalizedSearch)) {
+    return true;
+  } else {
+    return false;
+  }
 }
+
+
+console.log(isBookApplicable("javascript"));   
+console.log(isBookApplicable("javascript "));  
+console.log(isBookApplicable("python"));      
+console.log(isBookApplicable("JavaScript"));   
+console.log(isBookApplicable("JAVASCRIPT"));   
diff --git a/task-2/parse-date.js b/task-2/parse-date.js
index 877a3aa..97be7a4 100644
--- a/task-2/parse-date.js
+++ b/task-2/parse-date.js
@@ -1 +1,20 @@
-// Your code here
+function parseDateString(dateString) {
+    if (dateString.startsWith("MDY")) {
+        return { 
+            day: Number(dateString.substring(7, 9)), 
+            month: Number(dateString.substring(4, 6)), 
+            year: Number(dateString.substring(10, 14)) 
+        };
+    } else {
+        return { 
+            day: Number(dateString.substring(4, 6)), 
+            month: Number(dateString.substring(7, 9)), 
+            year: Number(dateString.substring(10, 14)) 
+        };
+    }
+}
+
+console.log(parseDateString("MDY 10-21-1983")); 
+console.log(parseDateString("DMY 21-10-1983")); 
+console.log(parseDateString("MDY 03-15-2024"));
+console.log(parseDateString("DMY 15-03-2024"));
\ No newline at end of file
diff --git a/task-3/date.js b/task-3/date.js
new file mode 100644
index 0000000..f55c2cc
--- /dev/null
+++ b/task-3/date.js
@@ -0,0 +1,23 @@
+export function convertHoursToMinutes(hours) {
+  return hours * 60;
+}
+
+export function convertMinutesToHours(minutes) {
+  return minutes / 60;
+}
+
+export function convertDaysToHours(days) {
+  return days * 24;
+}
+
+export function convertHoursToDays(hours) {
+  return hours / 24;
+}
+
+export function convertMinutesToSeconds(minutes) {
+  return minutes * 60;
+}
+
+export function convertSecondsToMinutes(seconds) {
+  return seconds / 60;
+}
\ No newline at end of file
diff --git a/task-4/cleanup.js b/task-4/cleanup.js
index 207523a..a3a1add 100644
--- a/task-4/cleanup.js
+++ b/task-4/cleanup.js
@@ -1,80 +1,65 @@
-// Temperature conversion and weather report for City 1
 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("---");
+let windSpeed1 = 15;
 
-// Temperature conversion and weather report for City 2
 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("---");
+let windSpeed2 = 20;
 
-// Temperature conversion and weather report for City 3
 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) {
+let windSpeed3 = 25;
+
+let cityName4 = "Dublin";
+let tempCelsius4 = 8;
+let windSpeed4 = 10;
+
+let cityName5 = "Edinburgh";
+let tempCelsius5 = 12;
+let windSpeed5 = 18;
+
+
+function temperatureConversions(tempCelsius) {
+  let tempFahrenheit = (tempCelsius * 9 / 5) + 32;
+  let tempKelvin = tempCelsius + 273.15;
+  return { tempFahrenheit, tempKelvin };
+}
+
+function weatherReport(tempCelsius) {
+if (tempCelsius < 0) {
   console.log("Status: Freezing");
-} else if (tempCelsius3 >= 0 && tempCelsius3 < 10) {
+} else if (tempCelsius >= 0 && tempCelsius < 10) {
   console.log("Status: Cold");
-} else if (tempCelsius3 >= 10 && tempCelsius3 < 20) {
+} else if (tempCelsius >= 10 && tempCelsius < 20) {
   console.log("Status: Mild");
-} else if (tempCelsius3 >= 20 && tempCelsius3 < 30) {
+} else if (tempCelsius >= 20 && tempCelsius < 30) {
   console.log("Status: Warm");
 } else {
   console.log("Status: Hot");
 }
-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");
+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);
+}
 
-// 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");
+function displayWeatherReport(cityName, tempCelsius, windSpeed) {
+  let { tempFahrenheit, tempKelvin } = temperatureConversions(tempCelsius);
+  let windChillValue = windChill(tempCelsius, windSpeed);
 
-// 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
+  console.log(`Weather Report for ${cityName}`);
+  console.log(`Temperature: ${tempCelsius}°C`);
+  console.log(`Temperature: ${tempFahrenheit.toFixed(1)}°F`);
+  console.log(`Temperature: ${tempKelvin.toFixed(2)}K`);
+  
+  weatherReport(tempCelsius);
+  
+  console.log(`Wind chill in ${cityName}: ${windChillValue.toFixed(2)}°C`);
+  console.log("---");
+}
+
+console.log(displayWeatherReport(cityName1, tempCelsius1, windSpeed1));
+console.log(displayWeatherReport(cityName2, tempCelsius2, windSpeed2));
+console.log(displayWeatherReport(cityName3, tempCelsius3, windSpeed3));
+console.log(displayWeatherReport(cityName4, tempCelsius4, windSpeed4));
+console.log(displayWeatherReport(cityName5, tempCelsius5, windSpeed5));
\ No newline at end of file
diff --git a/task-4/cleanup_legacy.js b/task-4/cleanup_legacy.js
new file mode 100644
index 0000000..207523a
--- /dev/null
+++ b/task-4/cleanup_legacy.js
@@ -0,0 +1,80 @@
+// Temperature conversion and weather report for City 1
+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 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 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");
+} else {
+  console.log("Status: Hot");
+}
+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