Assume the following open economy
C = 300 + 0.80(Y - 125)
I = 150
G = 250
X =115
M = 125+.05Y
a. Conclude the equilibrium level of income or GDP (Y).
b. Conclude the impact on income of a 50 increase in government spending from 250 to 300.
c. With the help of original data, calculate the impact of a 50 decrease in taxes from 125 to 75.
d. How much should it raise government spending, if the government looks to raise income to 3000?