Assume that (a) the price level is flexible upward but not downward and (b) the economy is currently operating at its full-employment output. Other things equal, how will each of the following affect the equilibrium price level and equilibrium level of real output in the short run? ·         An increase in aggregate demand. ·         A decrease in aggregate supply, with no change in aggregate demand. ·         Equal increases in aggregate demand and aggregate supply. ·         A decrease in aggregate demand. ·         An increase in aggregate demand that exceeds an increase in

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A: