C = 300 + 0.8Yd; C = consumption function; Yd (Y-T) = disposable income I = 200; I = Investment G = 400; G = Government expenditure T = 200; T = Tax revenue Also assume that Yf = Full employment GDP (Potential GDP) = 5,000

The MPC and MPS for the economy is respectively:

a. 0.9 and 0.1

b. 0.85 and 0.15

c. 0.75 and 0.25

d. 0.80 and 0.20