7 0 -18 Let A = 6 -12 3 0 -8 The eigenvalues of A are A = 1 and 1 = -2. (a) Find a basis for the eigenspace En of A associated to the eigenvalue 1 = 1 BE = (b) Find a basis of the eigenspace E_2 of A associated to the eigenvalue 1 = -2. BE 2= Observe that the matrix A is diagonalizable. Check