In 2011, the exchange rate changed from 94 yen per U.S. dollar in January to 84 yen per U.S. dollar in June, and back to 94 yen per dollar in December. What information would you need to determine the...

In 2011, the exchange rate changed from 94 yen

per U.S. dollar in January to 84 yen per U.S.

dollar in June, and back to 94 yen per dollar in

December. What information would you need to

determine the factors that caused these changes

in the exchange rate? Which factors would

change both demand and supply?