2. Suppose the Fed reduces the money supply by 5 percent. Assume that the velocity of money is constant. a. What happens to the aggregate demand curve? b. What happens to output and the price level in the short run and in the long run? Give a precise numerical answer. c. In light of your answer to part (b), what happens to unemployment in the short run and in the long run, according to Okun's law? Again, give a precise numerical answer. d. In what direction does the real interest rate move in the short run and in the long run? (Hint: Use the model of the real interest rate in Chapter 3 to see what happens when output changes.)