content area top Part 1 Consider a simple macro model with a constant price level and demand-determined output. The equations of the model are: Cequals200plus0.80Y, Iequals350, Gequals650, Tequals0, Xequals150, IMequals0.06Y. The marginal propensity to spend on national income, z, is ________. Question content area bottom Part 1 A.0.752 0.752 B.0.632 0.632 C.0.552 0.552 D.0.848 0.848 E.0.740 0.740 Your answer is correct. The marginal propensity to spend on national income, z, is ________. Grapher