Let A = {a, b, c, d} and define a relation R on A as follows: R = {(a, a), (b, b), (b, d), (c, c), (d, b), (d, d) }. It is a fact that R is an equivalence relation on A. Use set-roster notation, to write the equivalence classes of R. [a] = {a} [b] = {b,d } [c] = {c} [d] = {c} X How many distinct equivalence classes does R have? 3 List the distinct equivalence classes of R. (Enter your answer as a comma-separated list of sets.) {a}, {b,d } , {c} Need Help? Read It Talk to a TutorLet A = {-2, -1, 0, 1, 2, 3, 4, 5, 6, 7} and define a relation R on A as follows: For all x, YEA, XRy