Please help me answer this question.

Q4 [ 5 marks] Consider the algorithm below which, when given two non-empty strings s1 and s2 such that the length of s2 is the square of the length of the length of s1, determines whether s1 is a substring of s2. Let n represent the length of s1,len(s1). The length of s2 is n2. i=0 substring = FALSE while i