Suppose that AS/AD model is given by
Yp=$500 Billion
P= 200-0.1Y
P=20+0.4Y
Where Yp is potential GDP, Y is real GDP in billion of dollars and P is GDP deflator. By how much overall should the government expenditures change to achieve potential GDP level if MPC=0.8? Calculate the size of inflation/deflation associated with this fiscal policy action. Present graphical interpretation of the problem.