State whether the following relations are functions or not. If it is a function check for one-to-oneness and ontoness. If it is not a function, state why?
(i) If A = {a, b, c] and /= {(a, c), (b, c), (c, b)};(f: A ➝ A).
(ii) If X = {x, y, z} and /= {(x, y), (x, z), (z, x)}; (f: X ➝ X).