M (f) = {la, nxn , €f}and let =ae m: a =a, w2 = {a em: a' a} then which of the following is correct? wx w2 = m,xn f) wx w mpxn f) m,f) may be a direct sum of w,

M (F) = {la, nxn , €F}and let =AE M: A =A, W2 = {A eM: A' A} Then which of the following is correct? Wx W2 = M,xn F) Wx W Mpxn F) M,F) may be a direct sum of W, and W, Xn W+ W2 may not be a subspace of M,v (F) n xn