Please need an answer to these 3 asap

Let Compute (-3,3) (-3, 3) = Ot w = -4xy+2yz + zz, x = st, y = est, z = t2 Suppose z = r sin(y), x = 4s - 3t, y = 8st. T A. Use the chain rule to find and as functions of x, y, s and t. 9z Os Oz Ot B. Find the numerical values of and when (s, t) = (-1,-3). (-1,-3)= (-1,-3)= Us T y Suppose w= + where Z =e, y=2+ sin(4t), and z = 2+ cos(5t). dw 1. Use the chain rule to find as a function of x, y, z, and t. Do not rewrite x, y, and z in terms of t, and do not rewrite e as . dt 4t dw dt Note: Your answer should be an expression in x, y, z, and t; e.g. "3x - 4y+ 2t" 2. Use part 1. to evaluate dw dt when t=0.