Assume in this part that prices are sticky and PPP holds only in the long run. The central bank undertakes a permanent reduction of the money demand. Use the DD-AA model to answer the following. a. Fill in the boxes with an " " if increases, " " if decreases, or " " if no change. b. Show the effect of the above change in a graph. Use "1", "2", and "3" to indicate the initial, short-run, and long-run positions of the economy. Show also the AA and DD schedules in the initial, short-run and long-run position. (For instance, AA1 and AA3 denote the AA schedule in the initial and long-run positions.) Assume in this part that prices are sticky and PPP holds only in the long run. The central bank undertakes a permanent reduction of the money demand. Use the DD-AA model to answer the following. a. Fill in the boxes with an " " if increases, " " if decreases, or " " if no change. b. Show the effect of the above change in a graph. Use "1", "2", and "3" to indicate the initial, short-run, and long-run positions of the economy. Show also the AA and DD schedules in the initial, short-run and long-run position. (For instance, AA1 and AA3 denote the AA schedule in the initial and long-run positions.)