Fall2017 14 Partial Derivatives: Problem 13 Previous Problem Problem List Next Problem (1 point) Suppose z z2 sin y. z 182 + 2t2, y--2st A. Use the chain rule to find ìº and ìº as functions of x, y, s and t. ot B. Find the numerical values of ìº and when (s, t)-(3, 3) (3,3) (33) Note: You can earn partial credit on this problem.