Suppose that over a five-year period, nominal GDP increases by 5 percent while real GDP decreases by 5 percent. What has happened to the level of output of this economy during this five-year period? Explain your reasoning briefly. a. b. What has happened to the level of prices during this five-year period? Explain your reasoning briefly. C. Use an aggregate demand-aggregate supply graph to show shift(s) of curves that would lead to this result.