The following data represent the economy of Yahooland:

C=1000+0.5Y_d, T=200, G=400, I=500

(a) Calculate the equilibrium level of output. Graph your solution.

(b) If the government spending increases by 400 what is the new equilibrium level of output? Use the government spending multiplier.

(c) If the government increases taxes by 400 what is the new equilibrium level of output? Use the tax multiplier.

(d) If the government increases taxes and spending by 400 what is the new equilibrium level of output?

(e) Calculate the equilibrium level of output in case where taxes depend on income according to the following: T= -100+0.1Y.