Please help me!

6) Assume the following equations summarize the structure of the economy. Commodity Market: C = Ca + 0.5(Y-T); Ca = 500; T = 200; Ip = 1,500-50r; G = 100; Money Market: Md = 0.25Y -25r + 1,000; MY = 250 Labor Supply:NS = 100(p) Production Function:Y = 20/0.5 a) Calculate the AD curve (1.5) b) Suppose we have a competitive labor market with perfectly flexible wages, calculate the AS curve (0.5) and the macroeconomic equilibrium (0.5) c) Suppose we have a labor market that has a fixed nominal wage W = 2, calculate the AS curve (2) and the macroeconomic equilibrium (1). Explain the differences between the AS curves in c) and b) (hint labor market) (1)