Suppose z = x² sin y, x = 3s²2t², y = 6st. A. Use the chain rule to find and as functions of x, y, s дz It მყ and t. дz = მყ əz Ət B. Find the numerical values of and when Ət (s, t) =(4,-3). az (4, -3): = (4, -3) = дz Ət =