(b) (8 points] Consider the sequence (ak2o satisfying ao 0, a4, and n 2 2, an 2an-13an-2 Prove by strong mathematical induction that Vn 2 0, a3 - (-1)* c)4 points) Consider a predicate P). Suppose that we have proved P(-1) and P(3). Find the set of integers k for which P(k) is proved true if we also prove that: Vk >0, P(k 1) A P(k-3) P(k +2), Pk-2