Please show me how to calculate these problems by showing your work step by step

Question

Please show me how to calculate these problems by showing your work step by step and telling me how you got each answer.

You are given the following data concerning Freedonia, a legendary country:

(1) Consumption function: C = 1000 + 0.95Y

(2) Investment function: I = 400

(3) AE = C                + I

(4) AE = Y

                a. What is the marginal propensity to consume and the marginal propensity to save?

                b. Solve for equilibrium income.

                c. Suppose the second equation is changed to I = 500. What is the new equilibrium level of income? How much does the $100 increase in investment change                equilibrium GDP?

d. Calculate the saving function.

Explanation / Answer

Average Propensity to Consume

Consumption / Income ----- C / I

Measurement of how much money (income) a consumer spends (consumption) relative to how much they earn.
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