9 5 9 9 In Exercises 1-10, determine whether the given relation is an equivalence relation on {1, 2, 3, 4, 5). If the relation is an equiv- alence relation, list the equivalence classes. (In Exercises 510, X, y {1, 2, 3, 4, 5).) 1. {(1, 1), (2, 2), (3, 3), (4,4), (5,5), (1,3), (3, 1)} 2. {(1, 1), (2, 2), (3, 3), (4,4), (5,5), (1, 3), (3, 1), (3, 4), (4,3)} 3. {(1, 1), (2, 2), (3, 3), (4,4)} 4. {(1, 1), (2, 2), (3, 3), (4,4), (5,5), (1,5), (5, 1), (3,5), (5,3), (1,3), (3, 1)) 5. {(x, y) 1