Please help me out with these questions :

Question 1:

Use the DD-AA model to examine the effects of a one-time rise in the foreign price level, P*.If the expected future exchange rate rises immediately in proportion to P* (in line with PPP), show that the exchange rate will also appreciate immediately in proportion to the rise in P*.If the economy is initially in internal and external balance, will its position be disturbed by such a rise in P*?

Question 2:

If foreign inflation rates rise permanently, do you expect floating exchange rates to insulate the domestic economy in the short run? What would happen in the long run?