Questions 1. If U is an eigenvalue of A, then dct(A) : U. 2. If U is an eigenvalue of A, then A is invertible. 3. If (.1 is an eigenvalue of A, then ke'r'(A) 75 {ll} 4. If 1? is an eigenveetor of A with associated eigenvalue A, then '2? is an eigenvector of A2 with associated eigenvalue A2. 5. If A is an orthogonal matrix, then A = 1 is the only eigenmlue of A