In a three country world, a central bank fixes one exchange rate but lets the others float Can it use monetary policy to affect output Can it fix both exchange rates ...

In a three-country world, a central bank fixes one exchange rate but lets the others float. Can

Question:

In a three-country world, a central bank fixes one but lets the others float. Can it use monetary policy to affect output? Can it fix both exchange rates?

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...