QUESTION 6 Let f(I, y) = 2y' - 2xy + 12 + 1 Find the local minimum points, local maximum points, and saddle points of f. CULUS III: HW 10 QUESTION 7 Find three positive numbers whose sum is 9 and whose product is as large as possible. QUESTION 8 Find the points on the surface 2 = my + 5 which are closest to the origin. (Hint: express 2' in terms of x and y, and use this to express the distance formula as a function of r and y. Then minimize this distance function, or its square.) QUESTION 9 Let f(I, y) = 1+ 2ry + + 25 Find the local minimum points, local maximum points, and saddle points of f