For the (pseudo) assembly code below, replace X, Y, P, and Q with the smallest set of instructions to save/restore values on the stack and update the stack pointer. Assume that procA and procB were written independently by two different programmers who are following the MIPS guidelines for caller-saved and callee-saved registers. In other words, the two programmers agree on the input arguments and return value of procB, but they can't see the code written by the other person.(50 points) procA: $s0 = ... $s1 = ... $s2 = ... $t0 = ... $t1 = ... $t2 = ... X $a0 = ... $a1 = ... jal procB Y ... = $s1 ... = $t0 ... = $t1 ... = $a0 jr $ra procB: P ... = $a0 ... = $a1 $s2 = ... $t0 = ... Q jr $ra