Suppose the potential level of real domestic output (Q) for a hypothetical economy is

$160 and the price level (P) initially is 200. Use the following short-run aggregate supply schedules to answer the questions.

AS (P = 200) AS (P = 210) AS (P = 190)

P     Q      P    Q     P    Q

210 190 210 160 210 220

200 160 200 130 200 190

190 130 190 100 190 160

(a) What will be the short-run level of real GDP if the price level rises unexpectedly from 200 to 210 because of an increase in aggregate demand? Falls unexpectedly from 200 to 190 because of a decrease in aggregate demand?

Explain each situation.

(b) What will be the long-run level of real GDP when the price level rises from 200 to 210? Falls from 200 to 190? Explain each situation.

(c) Show the circumstances described in (a) and (b) on the graph below and derive the long-run aggregate supply curve.