Help me in solving SESO26 problem

My issue

Rearrange the following code

MERGE-SORT(A, left, middle)

if left < right

middle = (left + right) / 2

MERGE-SORT(A, left, right)

MERGE-SORT(A, middle + 1, right)

MERGE(A, left, middle, right)

In the above MERGE-SORT(A, left, right) should be MERGE-SORT(A, left, middle) and the quiz will always result in wrong answer

Learning course: Searching and Sorting Algorithms
Problem Link: Merge Sort in Searching and Sorting Algorithms