I need help solving the answer for this question, as well as the work shown to get the answer, for part b only. I have attached the photo of the question.

2. Suppose from one year to the next, real GDP increased by 5% while nominal GDP increased by 4%. a. From this information, what can you can say about the change in the GDP deflator (price index)? Show your work. b. Which curve (Aggregate Demand or Aggregate Supply) would we infer was the dominant shift in the output market, and which direction do we infer it shifted. Explain how you figure this out