Let A = {a, b, c, d, e}, B = {1, 2, 3, 4, 5} and let us consider the function f : A → B, f(a) = 3, f(b) = 4, f(c) = 2, f(d) = 5, f(e) = 1. Decide whether f is injective, surjective or bijective.

Let A = {1, 2} and B = {-1,0, 1}. Answer the following questions using careful, accurate notation for each: (a) A x B = (Do not type any space or unnecessary characters.) (b) Write two non-empty relations from A to B: (Separate your relations with a semicolon.) (c) How many relations from A to B are there in total? (d) Write a function from B to A in set notation: (e) Is the relation R = {(x, y) | x E A, y E B, x y} a function from A to B? • Justify your answer by providing a short reason here: ere to search