in c++ code

3. (60 min) Coding problem Now it's your turn to write code! You are required to write code that merges two arrays. This means you will be given two arrays and you are required to append the elements of the second array to the first one. But before doing so, you must first allocate enough space for this operation. After the two arrays are merged, you should free their space Here is a skeleton code to better understand what you should be doing. The expected output is also given. Now write your code in the area indicated by the comment //write your code here. #include using namespace std; int main () int s1-3, s2-5; int* a1new int[s11 (1,2,3) int a2new intIs21 (10,20,30, 40, 50; int* arr int sz; this is the merged array that you will create // what should be its size 'sz'? // write your code here // do not forget to free the memory used by the two arrays here for (int i-0 i