diff --git a/package-lock.json b/package-lock.json
index 17a9b03..bdfb890 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1079,6 +1079,7 @@
       "version": "22.13.5",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-22.13.5.tgz",
       "integrity": "sha512-+lTU0PxZXn0Dr1NBtC7Y8cR21AJr87dLLU953CWA6pMxxv/UDc7jYAY90upcrie1nRcD6XNG5HOYEDtgW5TxAg==",
+      "dev": true,
       "license": "MIT",
       "dependencies": {
         "undici-types": "~6.20.0"
@@ -4318,6 +4319,7 @@
       "version": "6.20.0",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.20.0.tgz",
       "integrity": "sha512-Ny6QZ2Nju20vw1SRHe3d9jVu6gJ+4e3+MMpqu7pqE5HT6WsTSlce++GQmK5UXS8mzV8DSYHrQH+Xrf2jVcuKNg==",
+      "dev": true,
       "license": "MIT"
     },
     "node_modules/update-browserslist-db": {
diff --git a/src/challenge.ts b/src/challenge.ts
index 63a7766..46fe023 100644
--- a/src/challenge.ts
+++ b/src/challenge.ts
@@ -8,6 +8,7 @@
 // logger<number>([1, 2, 3]);
 // logger<number | string>([1, 2, 3, "one", "two", "three"]);
 function logger<T>(array: T[]): void {
+  array.forEach((element) => console.log(element));
   // write your code here...
 }
 
@@ -20,7 +21,7 @@ function logger<T>(array: T[]): void {
 function toCelsius(temperatures: number[]): number[] {
   // write your code here...
 
-  return []; // replace empty array with what you see is fit
+  return temperatures.map((fahrenheit)=> (fahrenheit -32)*(5/9)); // replace empty array with what you see is fit
 }
 
 // `hottestDays` function that:
@@ -33,7 +34,7 @@ function toCelsius(temperatures: number[]): number[] {
 function hottestDays(temperatures: number[], threshold: number): number[] {
   // write your code here...
 
-  return []; // replace empty array with what you see is fit
+  return temperatures.filter((temp)=> temp > threshold); // replace empty array with what you see is fit
 }
 
 // `logHottestDays` function that:
@@ -42,6 +43,10 @@ function hottestDays(temperatures: number[], threshold: number): number[] {
 // - Log temperatures that exceed the threshold to the console IN DEGREES CELSIUS  (hint: you can combine all previous functions)
 function logHottestDays(temperatures: number[], threshold: number): void {
   // write your code here...
+  const hotDays = hottestDays(temperatures,threshold);
+  const hotDaysInCelsius = toCelsius(hotDays);
+  logger(hotDaysInCelsius);
+
 }
 
 export { logger, toCelsius, hottestDays, logHottestDays };
diff --git a/src/filtering.ts b/src/filtering.ts
index 49411d8..7fa92c1 100644
--- a/src/filtering.ts
+++ b/src/filtering.ts
@@ -11,8 +11,7 @@ const numbers = [10, 13, 20, 25, 38, 35, 40];
 // greaterThanTwentyFive(numbers); // => [38, 35, 40]
 function greaterThanTwentyFive(numbers: number[]): number[] {
   // write your code here...
-
-  return []; // replace empty array with what you see is fit
+  return numbers.filter(number => number >= 25); // replace empty array with what you see is fit
 }
 
 // `divisibleByFive` function that:
@@ -23,7 +22,7 @@ function greaterThanTwentyFive(numbers: number[]): number[] {
 function divisibleByFive(numbers: number[]): number[] {
   // write your code here...
 
-  return []; // replace empty array with what you see is fit
+  return numbers.filter(number => number % 5 === 0); // replace empty array with what you see is fit
 }
 
 export { greaterThanTwentyFive, divisibleByFive };
diff --git a/src/mapping+filtering.ts b/src/mapping+filtering.ts
index 269ad83..023d318 100644
--- a/src/mapping+filtering.ts
+++ b/src/mapping+filtering.ts
@@ -12,7 +12,7 @@ const numbers = [10, 13, 20, 25, 38, 35, 40];
 function filteredAndSquared(numbers: number[]): number[] {
   // write your code here...
 
-  return []; // replace empty array with what you see is fit
+ return numbers.filter(number => number >= 20).map(number => number * number); // replace empty array with what you see is fit
 }
 
 // `filteredAndTripled` function that:
@@ -23,7 +23,7 @@ function filteredAndSquared(numbers: number[]): number[] {
 function filteredAndTripled(numbers: number[]): number[] {
   // write your code here...
 
-  return []; // replace empty array with what you see is fit
+  return numbers.filter(number => number % 5 === 0).map(number => number * 3); // replace empty array with what you see is fit
 }
 
 export { filteredAndSquared, filteredAndTripled };
diff --git a/src/mapping.ts b/src/mapping.ts
index 6f18eef..2b5cece 100644
--- a/src/mapping.ts
+++ b/src/mapping.ts
@@ -12,7 +12,7 @@ const numbers = [10, 13, 20, 25, 38, 35, 40];
 function squaredNumbers(numbers: number[]): number[] {
   // write your code here...
 
-  return []; // replace empty array with what you see is fit
+  return numbers.map(number => number * number); // replace empty array with what you see is fit
 }
 
 // `doubledNumbers` function that:
@@ -23,7 +23,7 @@ function squaredNumbers(numbers: number[]): number[] {
 function doubledNumbers(numbers: number[]): number[] {
   // write your code here...
 
-  return []; // replace empty array with what you see is fit
+  return numbers.map(number => number * 2); // replace empty array with what you see is fit
 }
 
 export { squaredNumbers, doubledNumbers };