Suppose that A e R7x4 is saved in MATLAB. Which of the following is the most suitable in finding an orthonormal basis of the column space of A? (There is only one answer.) Terminology. The column space of A is the subspace of R7 spanned by the columns of A. It is also called the range of A O [Q, 7 = qr(A): O [Q,"]=qr(A, 0); [Q,"]= lu(A): O Q = chol(A)