== 2. Suppose that A = {1, 2, 3), B = (4, 5), C (a, b, c, d), R = {(1, b), (2, a), (2, b), (2, c), (3, d)) and S = {(4, a), (4, d), (5, b), (5, c)). Note that R is a relation from A to C and S is a relation from B to C. a. Find S O R. This is a relation from which set to which other set? Justify your solution. b. Find ROS. This is a relation from which set to which other set? Justify your solution.