Suppose a closed economy is characterized by: Y=12000, G = 3000, T = 3000, I = 5000 - 2000r, C = 500 + 0.5(Y-T) where r in the real interest rate. Calculate the following: Public savings, Private savings, investment and real interest rate.                                                                                                                  please answer step by step.Answer must be correct.Show all calculation. please Don,t copy from anywhere.

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