Question 14 When using a direct proof to establish the validity of the following theorem: Ifnis odd, then (n + 2)2 is odd (where n is an integer) we start by: assuming that n = 2k where k is an integer. assuming that n = 2k + I where k is an integer. e assuming that (n + 2)2 is even. e assuming that (n + 2)2 is odd. Question 9 Theorem: " If the quiz is easy then 1+2 equals 3". The above theorem demonstrates the method of proof known as: O Proof by Contraposition Vacuous Proof O Trivial Proof Proof by Contradiction