Consider a symmetric nxn matrix = Q.Define Amin(a'Qr: x= 1) and eargmin{a'Qr: | 1), and for k= 0,....n-1 A = min{a'Qx: ||||=1, z'e, = 0, i=1..., k} e: argmin (zQr: r = 1. r'e =0,i=1....k). a) Show that A SASSA and that ele, = 0 for i #j. b) Interpret A...,A,, as Lagrange multipliers and show that A.As are the eigenvalues of Q while e.....em are the eigenvectors.