For Each Outcome Below,tell What Type of Shift Must Have

Essay

For each outcome below,tell what type of shift must have taken place in either the aggregate demand curve or the long-run aggregate supply curve.
(a)In the short run,the price level is unchanged and output rises.
(b)In the long run,the price level declines and output is unchanged.
(c)In the long run,the price level rises and output declines.