Question 16 (2 points) The relation {(a, 1), (b,2), (a, 1), (c,5)} from {a,b, c) to {1,2,3,4,5) is a function. ( 1) True ( 2) False Question 17 (2 points) The relation {(c, 1), (b,3), (c,4), (a,2), (c,5)} from {a,b, c} to {1,2,3,4,5} is a function. ( 1) True ( 2) False Question 18 (2 points) The relation {(a, 1), (b, 1), (c,2)} from {a,b,c] to {1,2} is a function. ( 1) True ( 2) False