Use the AD-SAS model to explain how differences in exchange rate policy, fiscal policy, and policy toward

Question:

Use the AD-SAS model to explain how differences in policy, fiscal policy, and policy toward wages and prices made the Great Depression worse in the United States than it was in the United Kingdom or Germany.
Exchange Rate
The value of one currency for the purpose of conversion to another. Exchange Rate means on any day, for purposes of determining the Dollar Equivalent of any currency other than Dollars, the rate at which such currency may be exchanged into Dollars...