3. (1o+8) Consider the relation, R, on the set A = {-2, --4, -1,0,3,6,9} For x,y e A, xRy if x - y = 5m for some integer m. (A) Verify that this relation is transitive. You can't use the condition in (B) (B) It is well known that R is an equivalence relation. No need to verify. Find two of its equivalence classes.