I need help with these questions.

Previous Problem Problem List Next Problem (1 point) If z = sin I = 2t, y = 2 - t, find dz dt using the chain rule. Assume the variables are restricted to domains on which the functions are defined. dz atPrevious Problem Problem List Next Problem (1 point) Suppose z = z'sin y, z = 1s- - 1t-, y = -2st. A. Use the chain rule to find and as functions of x, y, s and t. at 83 B. Find the numerical values of az and ot when (s, t) = (-1, -1) as (-1, -1) = " (-1, -1) =