Find the eigenvalues of the matrix [ 1 1 1 1 1 ] [ 1 1 1 1 1 ] A = [ 1 1 1 1 1 ] [ 1 1 1 1 1 ] [ 1 1 1 1 1 ] with their multiplicities. Note that the algebraic multiplicity agrees with the geometric multiplicity. (Why?) (Hint: What is the kernel of A?)