diff --git a/lesson_07/conditionals/.env.test b/lesson_07/conditionals/.env.test
index de8c44249..8532774b0 100644
--- a/lesson_07/conditionals/.env.test
+++ b/lesson_07/conditionals/.env.test
@@ -1 +1 @@
-HW_VERSION=your homework version here
\ No newline at end of file
+HW_VERSION=A
\ No newline at end of file
diff --git a/lesson_07/conditionals/package.json b/lesson_07/conditionals/package.json
index f5f8dd4fd..ea54b41dd 100644
--- a/lesson_07/conditionals/package.json
+++ b/lesson_07/conditionals/package.json
@@ -17,18 +17,22 @@
   "license": "ISC",
   "devDependencies": {
     "@alfonso-presa/soft-assert": "^0.6.0",
+    "@babel/core": "^7.26.10",
+    "@babel/preset-env": "^7.26.9",
+    "@babel/preset-typescript": "^7.26.0",
     "@eslint/js": "^9.17.0",
     "@types/eslint__js": "^8.42.3",
     "@types/jest": "^29.5.14",
     "@types/node": "22.10.2",
+    "babel-jest": "^29.7.0",
     "copyfiles": "^2.4.1",
     "eslint": "^9.17.0",
     "eslint-config-prettier": "^9.1.0",
     "jest": "^29.7.0",
     "prettier": "3.4.2",
-    "ts-jest": "^29.2.5",
+    "ts-jest": "^29.2.6",
     "ts-node": "^10.9.2",
-    "typescript": "^5.7.2",
+    "typescript": "^5.7.3",
     "typescript-eslint": "^8.18.0"
   },
   "dependencies": {
diff --git a/lesson_07/conditionals/src/lesson7.ts b/lesson_07/conditionals/src/lesson7.ts
index cc44be44c..3da34bbfc 100644
--- a/lesson_07/conditionals/src/lesson7.ts
+++ b/lesson_07/conditionals/src/lesson7.ts
@@ -12,9 +12,13 @@ export function compareStrings(a: string, b: string): number {
   // if it is greater, and 0 if the strings are equal.
   const distance = computeLexicographicDistance(a, b);
 
-  // TODO(you): Finish this method.
-
-  return 0;
+  if (distance < 0) {
+    return -1;
+  } else if (distance > 0) {
+    return 1;
+  } else {
+    return 0;
+  }
 }
 
 /**
@@ -24,7 +28,17 @@ export function compareStrings(a: string, b: string): number {
  * @return The factorial of n.
  */
 export function computeFactorial(n: number): number {
-  return 0;
+  if (n < 0) {
+    return 0;
+  }
+
+  let factorial = 1;
+
+  for (let i = 1; i < n; n--) {
+    factorial = factorial * n;
+  }
+
+  return factorial;
 }
 
 /**
@@ -34,7 +48,15 @@ export function computeFactorial(n: number): number {
  * @return An array containing the first `n` Fibonacci values.
  */
 export function getFirstNFibonacciNumbers(n: number): number[] {
-  return [];
+  if (n === 0) {
+    return [];
+  }
+
+  const fibNums = [1, 1];
+  for (let i = 2; i < n; i++) {
+    fibNums.push(fibNums[i - 1] + fibNums[i - 2]);
+  }
+  return fibNums;
 }
 
 /**
@@ -61,9 +83,16 @@ export function binarySearch(
 
   // TODO(you): Finish implementing this algorithm
 
-  // If values[pivotIndex] is equal to value then return `pivotIndex`.
-  // Else if values[pivotIndex] is greater than the value, then
-  // call `binarySearch(values, start, pivotIndex - 1, value)` and return its value;
-  // Else call `binarySearch(values, pivotIndex + 1, end, value)` and return its value.
-  return -1;
+  if (values[pivotIndex] === value) {
+    return pivotIndex;
+  } else if (values[pivotIndex] > value) {
+    return binarySearch(values, start, pivotIndex - 1, value);
+  } else {
+    return binarySearch(values, pivotIndex + 1, end, value);
+  }
 }
+
+// If values[pivotIndex] is equal to value then return `pivotIndex`.
+// Else if values[pivotIndex] is greater than the value, then
+// call `binarySearch(values, start, pivotIndex - 1, value)` and return its value;
+// Else call `binarySearch(values, pivotIndex + 1, end, value)` and return its value.
diff --git a/lesson_07/conditionals/src/part_a.ts b/lesson_07/conditionals/src/part_a.ts
index 7ad571136..be2dbb259 100644
--- a/lesson_07/conditionals/src/part_a.ts
+++ b/lesson_07/conditionals/src/part_a.ts
@@ -5,7 +5,11 @@
  * @return True if the age corresponds to a voting age and false otherwise.
  */
 export function canVote(age: number): boolean {
-  return false;
+  if (age >= 18) {
+    return true;
+  } else {
+    return false;
+  }
 }
 
 /**
@@ -15,7 +19,12 @@ export function canVote(age: number): boolean {
  * @return The sum of all the values.
  */
 export function addNumbers(values: number[]): number {
-  return 0;
+  let total = 0;
+
+  for (const test of values) {
+    total = total + test;
+  }
+  return total;
 }
 
 /**
@@ -25,5 +34,15 @@ export function addNumbers(values: number[]): number {
  * @return The factorial of n.
  */
 export function computeFactorial(n: number): number {
-  return 0;
+  if (n < 0) {
+    return 0;
+  }
+
+  let factorial = 1;
+
+  for (let i = 1; i < n; n--) {
+    factorial = factorial * n;
+  }
+
+  return factorial;
 }