4. Sorting the following array A using MergeSort goes through the following intermediate sequence ordered from 1 to 7. Identify and fix if you find any problem in this timing sequence. (3 marks) A = [9, 4, 8, 1, 7, 3, 5, 2]

Time sequence:

1. [4, 9, 8, 1, 7, 3, 5, 2]

2. [4, 9, 1, 8, 7, 3, 5, 2]

3. [1, 4, 8, 9, 7, 3, 5, 2]

4. [1, 4, 8, 9, 3, 7, 5, 2]

5. [1, 3, 4, 7, 8, 9, 5, 2]

6. [1, 3, 4, 7, 8, 9, 2, 5]

7. [1, 2, 3, 4, 5, 7, 8, 9]