Determine which of the following is incorrect. (a) If A is an invertible diagonal matrix, then A" is invertible. (b) If both A and B are invertible, then A - B is invertible. (c) If A is invertible, then (A")-1 = (A-1)". %3D (d) If A is invertible, then A = 0 is not an eigenvalue of A. (e) None of these