Suppose functions f: {1,2,3} {1,2,3}, g:{1,2,3} {1,2,3} are given as: f = {(1,2), (2, 1), (3,1)}, g = {(1,1), (2,3), (3,3)}. Find: a. gof, b. fog, c. (fog)of. d. The domains and ranges of these functions 3r