Consider a closed economy which can be characterized by the following equations: C = 400 + 0.8YD I = 600 + 0.1y- 1000r G = 300 T = 125 (M/P)d = 0.2Y-6000r (M/P)= 400 c. Determine the equilibrium values for real GDP (Y), the real interest rate (r), private consumption(C), investment (I) and private saving (S). Show that in equilibrium total saving equals investments. Graphics d. Suppose that government uses contractionary fiscal policy and decreases government expenditures to G = 200. What happens to the equilibrium? (Repeat exercise (c) for the new government expenditures. Graphics.