please solve part 2 asap

(1 point) Suppose w = + -, where 1 = est, y = 2 + sin(t), and z = 2 + cos(7t) dw 1. Use the chain rule to find as a function of c, y, z, and t. Do not rewrite r, y, and z in terms of t, and do not rewrite est as I. dw 5/y(en(51))+(1/z-x/y*2)(cos(t))+yiz*2(7sin(71)) Note: Your answer should be an expression in c, y, z, and t; e.g. "3x -4y + 2t" dw 2. Use part 1. to evaluate when t = 0 (5/y)-(2x)/(y^2)-(2/z)+((7y)/(2 2))