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6) Assume the following equations summarize the structure of the economy. Commodity Market: C = Ca + 0.5(YT); Ca = 500; T = 200; Ip = 1,500-50r; G = 100; Money Market: Md = 0.25Y 25r + 1,000; Labor Supply: Production Function: a) Calculate the AD curve (1.5) b) Suppose we have a competitive labor market with perfectly exible wages, calculate the AS curve (0.5) and the macroeconomic equilibrium (0.5) c) Suppose we have a labor market that has a xed nominal wage , 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)