(3 points) The matrix 0 10 20 A = 0 5 10 0 5 10 has two real eigenvalues: one of multiplicity 1 and one of multiplicity 2. Find the eigenvalues and a basis for each eigenspaoe. The eigenvalue Al is and a basis for its associated eigenspaoe is { }. The eigenvalue A2 is and a basis for its associated eigensoaoe is {