Problem 4: (4 + 2 points) Consider the following algorithm for finding the largest number in an array. function MYMAx(array A1..) if n-= 1 then return A[1] end if B+ empty array for i from 1 to [n /2] do append max(A[2i- 1), 2i]) to B end for if n is odd then append A[n] to B end if return MyMax(B) end function Find a -expression for the number of operations performed by the algorithm in terms of n