Consider a simple macro model with a constant price level and demand-determined output. We are given the following equations: C = 420 + 0.9Yd, I = 200, G = 300,T = 0.2Y, X = 280, IM = 0.12Y.

a) The marginal propensity the consume (b)

b)The marginal propensity the consume out of national income

c)Equilibrium national income (Y*)

d)The marginal propensity to spend (z)

e)The trade balance at equilibrium national income. (Indicate if it's a deficit or surplus)

f) The government budget balance at equilibrium national income. (Indicate if it's a deficit or surplus)