. Assume that a country's economy is currently in long-run equilibrium. (a) Draw a correctly labeled graph of aggregate demand and aggregate supply and show each of the following.
(i) The long-run aggregate supply curve
(ii) The current equilibrium output and price levels, labeled as YE and PLE, respectively

(b) Assume that the government increases spending on national defense without raising taxes.
(i) On your graph in part (a), show how the government action affects aggregate demand.
(ii) How will this government action affect the unemployment rate in the short run? Explain.

(c) Assume that the economy adjusts to a new long-run equilibrium after the increase in government spending.
(i) How will the short-run aggregate supply curve in the new long-run equilibrium compare with that in the initial long-run equilibrium in part (a)? Explain.
(ii) On your graph in part (a), label the new long-run equilibrium price level as PL2.

(d) In order to finance the increase in government spending on national defense from part (b), the government borrows funds from the public. Using a correctly labeled graph of the loanable funds market, show the effect of the government’s borrowing on the real interest rate.

(e) Given the change in the real interest rate in part (d), what is the impact on each of the following?
(i) Investment
(ii) Economic growth rate. Explain.