Find (a) the orthogonal projection of b onto Col A and (b) a least-squares solution of Ax = b. 01 -1 2 10-1 1 A= 1 1 1 2 -11 0 7 a. The orthogonal projection of b onto Col A is b= (Simplify your answers.) b. A least-squares solution of Ax = b is x= | (Simplify your answers.)