1) The relation R is an equivalence relation on the set A. Find the distinct equivalence classes of R. A = {a, b, c, d} R = {(a, a), (b, b), (b, d), (c, c), (d, b), (d, d)} 2) Let R be the relation of congruence modulo 7. Which of the following equivalence classes are equal? [35], [3], [7], [12], [0], [2], [17]

3) Determine whether the given relation is reflexive, symmetric, transitive, or none explain your answer:

O is the relation defined on Z as follows: For all m, n EZ, m O n m-n is odd