The columns of q were obtained by applying the gram-schmidt process to the columns of a. find the upper triangular matrix r such that a = qr. a = 2 3 7 4 8 −3 −4 −10 8 , q = 1 3 − 2 3 2 3 2 3 − 1 3 − 2 3 − 2 3 − 2 3 − 1 3