For each of the following relations on the set {1, 2, 3, 4), decide whether it is reflexive, whether it is symmetric, whether it is antisymmetric, and whether it is transitive: I a) {(2, 2), (2,3), (2,4), 3, 2), (3, 3), (3,4)} b) {(1, 1), (1, 2), (2, 1), (2, 2), (3, 3), (4,4)} c) {(2,4),(4,2))