diff --git a/task-1/book.js b/task-1/book.js
index 8b49ecc..e1ff424 100644
--- a/task-1/book.js
+++ b/task-1/book.js
@@ -1,3 +1,13 @@
 function isBookApplicable(searchString) {
-  // Your code here
+
+  const bookTitle = 'The fundamentals of JavaScript'.toLocaleLowerCase();
+  const query = searchString.trim().toLocaleLowerCase();
+
+  if (bookTitle.includes(query)) {
+    return true;
+  } else {
+    return false;
+  }
+
+
 }
diff --git a/task-2/parse-date.js b/task-2/parse-date.js
index 877a3aa..6868d46 100644
--- a/task-2/parse-date.js
+++ b/task-2/parse-date.js
@@ -1 +1,24 @@
-// Your code here
+function parseDateString(dateString) {
+    
+    const formatType = dateString.substring(0,3);
+    let day;
+    let month;
+
+    if (formatType === 'DMY') {
+        day = Number(dateString.substring(4,6));
+        month = Number(dateString.substring(7,9));
+    } else {
+        day = Number(dateString.substring(7,9));
+        month = Number(dateString.substring(4,6));
+    }
+ 
+    const year = Number(dateString.substring(10,14));
+    
+    const date = {
+        day: day,
+        month: month,
+        year: year
+    }
+    
+    return date;
+}
\ No newline at end of file
diff --git a/task-3/date.js b/task-3/date.js
new file mode 100644
index 0000000..350f458
--- /dev/null
+++ b/task-3/date.js
@@ -0,0 +1,7 @@
+export const convertHoursToMinutes = (hours) => hours * 60;
+export const convertMinutesToHours = (minutes) => minutes / 60;
+export const convertDaysToHours = (days) => days * 24;
+export const convertHoursToDays = (hours) => hours / 24;
+export const convertMinutesToSeconds = (minutes) => minutes * 60;
+export const convertSecondsToMinutes = (seconds) => seconds / 60;
+
diff --git a/task-4/cleanup.js b/task-4/cleanup.js
index 207523a..b5fba8f 100644
--- a/task-4/cleanup.js
+++ b/task-4/cleanup.js
@@ -1,80 +1,55 @@
-// 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");
+function convertCelsiusToFahrenheit (degreeCelsius) {
+  return (degreeCelsius * 9 / 5) + 32 + "°F";
+}  
+
+function convertCelsiusToKelvin(degreeCelsius) {
+  return degreeCelsius + 273.15 + "K"; 
 }
-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");
+
+function showWeatherStatus(degreeCelsius) {
+  if (degreeCelsius < 0) {
+    console.log("Status: Freezing");
+  } else if (degreeCelsius >= 0 && degreeCelsius < 10) {
+    console.log("Status: Cold");
+  } else if (degreeCelsius >= 10 && degreeCelsius < 20) {
+    console.log("Status: Mild");
+  } else if (degreeCelsius >= 20 && degreeCelsius < 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");
+
+
+function calculateWindChil(cityName, degreeCelsius, windSpeed) {
+  let windChill = 13.12 + 0.6215 * degreeCelsius - 11.37 * Math.pow(windSpeed, 0.16) + 0.3965 * degreeCelsius * Math.pow(windSpeed, 0.16);
+  console.log("Wind chill in " + cityName + ": " + windChill.toFixed(2) + "°C");
 }
-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
+
+function showWeatherReport(cityName, degreeCelsius) {
+  console.log("Weather Report for " + cityName);
+  console.log("Temperature: " + degreeCelsius);
+  console.log("Temperature: " + convertCelsiusToFahrenheit(degreeCelsius));
+  console.log("Temperature: " + convertCelsiusToKelvin(degreeCelsius));
+  showWeatherStatus(degreeCelsius);
+  console.log("---");
+}
+
+
+
+
+
+
+showWeatherReport("Amsterdam", 22);
+showWeatherReport("Berlin", 15);
+showWeatherReport("Copenhagen", -5);
+showWeatherReport("Den Haag", 25);
+
+
+
+calculateWindChil("Amsterdam", 22, 15)
+calculateWindChil("Berlin", 15, 20)
+calculateWindChil("Copenhagen", -5, 25)
+calculateWindChil("Den Haag", 25, 15)
+
+