c) Let X={1, 2, 3), Y={1, 2, 3, 4), and Z={1,2}. (6 marks) i. Define a function f: XY that is one-to-one but not onto. ii. Define a function g: X-Z that is onto but not one-to-one. iii. Define a function h: XXthat is neither one-to-one nor onto