The level curves of the surface z x y are circles in the xy plane centered at the origin Without computing the gradient what is the direction of the gradient at 5 4 and 1 3 determined up to a scalar multiple Determine the direction of the gradient at 5 4 Choose the correct answer below OA 5 4 OC 4 5 OE 4 5 Determine the direction of the gradient at 1 3 Choose the correct answer below OA 3 1 OC 1 3 OE 3 1 ACCES O B 5 4 OD 5 4 OF 4 5 OB 1 3 OD 1 3 OF 3 1