Consider a plain macro-model with constant price level and demand-determined output. Using the following equations: C= 125+ 0.81Y, I=250, G=325, T=0.1Y, X=300, IM=0.21Y

Calculate:

1. marginal propensity to consume
2. marginal propensity the consume out of national income
3. marginal propensity to spend
4. Equilibrium national income
5. Trade balance at eq national income (indicate if its a deficit or surplus)
6. government budget balance at eq national income (indicate if its a deficit or surplus)