Q2. a. Given an array of N integers called A, and the integer function max(x, y): that takes the two integers x and y as its input and returns the maximum of the two. Write a recursive java integer of the N integers in array A by using function called, arrayMax(All. N), to compute the m b. A square NxN integer matrix, that is also upper-triangular, where all elements below its diagonal have zero values, is represented by array A, to be stored in computer memory in column-major order, such that only the non-zero elements are stored. Derive an expression for an Array Mapping Function (AMF), to be used for calculating the address of any element A [i]. where i(. (forget how Java implements arrays). Assume the array indexing starts from zero, and a 4-byte integer