a) use matlab to show that R is a diagonal, square matrix with M = [ 1 2 3 4 5 6 7 8 9] on the diagonal.

b) using matlab, show that T is a 3 by 9 matrix with M = [1,2,3,4,5,6,7,8,9],N= [4,5,6,7,8,9,5] and K = [7,5,3,8,2,1] beginning in the first column and zeros in all othet elements