diff --git a/lesson_11/arrays_java/arrays_app/src/main/java/com/codedifferently/lesson11/Lesson11.java b/lesson_11/arrays_java/arrays_app/src/main/java/com/codedifferently/lesson11/Lesson11.java
index 248938a96..47fdf2768 100644
--- a/lesson_11/arrays_java/arrays_app/src/main/java/com/codedifferently/lesson11/Lesson11.java
+++ b/lesson_11/arrays_java/arrays_app/src/main/java/com/codedifferently/lesson11/Lesson11.java
@@ -1,5 +1,6 @@
 package com.codedifferently.lesson11;
 
+import java.util.ArrayList;
 import java.util.List;
 
 public class Lesson11 {
@@ -8,15 +9,33 @@ public class Lesson11 {
    * Provide the solution to LeetCode 1929 here:
    * https://leetcode.com/problems/concatenation-of-array
    */
-  public int[] getConcatenation(int[] nums) {
-    return null;
+  public static int[] getConcatenation(int[] nums) {
+    // Creates a variable named n that is the length of nums
+    int n = nums.length;
+    // Creates a new array that is double the size of n.
+    int[] ans = new int[2 * n];
+
+    for (int i = 0; i < n; ++i) {
+      // Gets the first half of the int array
+      ans[i] = nums[i];
+      // Gets the second half of the int array
+      ans[i + n] = nums[i];
+    }
+    return ans;
   }
 
-  /**
-   * Provide the solution to LeetCode 2942 here:
-   * https://leetcode.com/problems/find-words-containing-character/
-   */
-  public List<Integer> findWordsContaining(String[] words, char x) {
-    return null;
+  public static List<Integer> findWordsContaining(String[] words, char x) {
+    // Create an arraylist named arrList
+    ArrayList<Integer> arrList = new ArrayList<>();
+
+    // Runs a loop that will iterate through each character in the word.
+    for (int i = 0; i < words.length; i++) {
+      // will check to see if 'x' exists inside of the word
+      if (words[i].indexOf(x) != -1) {
+        // Stores the index if it is true that it has that character
+        arrList.add(i);
+      }
+    }
+    return arrList;
   }
 }
diff --git a/lesson_11/arrays_ts/src/lesson11.ts b/lesson_11/arrays_ts/src/lesson11.ts
index 54af1ba03..8c227f6af 100644
--- a/lesson_11/arrays_ts/src/lesson11.ts
+++ b/lesson_11/arrays_ts/src/lesson11.ts
@@ -1,15 +1,37 @@
+
 /**
- * Provide the solution to LeetCode 1929 here:
- * https://leetcode.com/problems/concatenation-of-array
- */
+* Provide the solution to LeetCode 1929 here:
+* https://leetcode.com/problems/concatenation-of-array
+*/
 export function getConcatenation(nums: number[]): number[] {
-  return [];
+  //Creates a variable named n that is the length of nums
+  const n = nums.length;
+  //Creates a new array that is double the size of n
+  const ans = new Array(2 * n); 
+
+  for (let i = 0; i < n; ++i) {
+    ans[i] = nums[i];
+    ans[i + n] = nums[i];
+  }
+  return ans;
 }
 
 /**
- * Provide the solution to LeetCode 2942 here:
- * https://leetcode.com/problems/find-words-containing-character/
- */
+* Provide the solution to LeetCode 2942 here:
+* https://leetcode.com/problems/find-words-containing-character/
+*/
 export function findWordsContaining(words: string[], x: string): number[] {
-  return [];
+ //creates a new array list names arrList
+ const arrList: number[] = []; 
+
+ //Runs a loop that will iterate through each character in the String.
+ for (let i = 0; i < words.length; ++i) {
+  //Checks to see if the word inclues the char 'x'
+   if (words[i].includes(x)) { 
+  //Pushes the index of i if it is true that the word contains that character
+     arrList.push(i); 
+   }
+    //Will return the Array list arrList
+ } return arrList;
 }
+