a$.$ Graphically illustrate an economy in long run equilibrium, producing at the full$-$employment level of production. Indicate the equilibrium price level $(P^{**})$ and the level of real GDP $(Y^{**})$

b$.$ Graphically illustrate an economy in short run equilibrium producing at a below full employment level of production. Indicate the equilibrium price level $(P^{**})$ and level of real GDP $(Y^{**})$ and show the amount of the recessionary gap.

c$.$ Graphically illustrate an economy in short run equilibrium producing at an above full employment level of production. Indicate the equilibrium price level $(P^{**})$ and level of real GDP $($Y$*)$ and show the amount of the inflationary gap.