(a) [8 marks] Find an invertible matrix P and a diagonal matrix D such that A = PDP-1. (b) [3 marks] Find P-1. (c) [3 marks] Use your answers to parts and (b) to compute A?. [Note that if you compute A? by computing the product A A, then you will get zero marks to (c)] 1 -1 Let A = -3 2 0. 0. 1