Help with part b and c

3. Consider the following program specification and implementation for determin- ing the mth Fibonacci number fm for me N. (Recall that the Fibonacci sequence is defined as fo = 0, f1 = 1, and fm = fm-1+fm-2 for m > 2.) 1 CS-MATH 240: Spring 2021 it fib(m) for m EN V1 (1) if m=0 return 0 (2) else (3) C+0 (4) Xt0 (5) (6) while c