2. Starting from equilibrium, explain in terms of changes in either AD or in AS (not both) how each of the following results could have occurred. a. Real GDP increases, and the price level increases. This could have occurred with a(n) (Click to select) in (Click to select ) b. Real GDP decreases, and the price level increases. This could have occurred with a(n) (Click to select) in (Click to select ) c. Real GDP increases, and the price level decreases. This could have occurred with a(n) (Click to select) in (Click to select) d. Real GDP decreases, and the price level decreases. This could have occurred with a(n) (Click to select) - in (click to select )