Indicate the direction of the shift in the supply curve or the demand curve for dollars; the factor causing the change, and the resulting movement of the equilibrium exchange rate for the dollar in terms of foreign currency if: 1. American-made cars become more popular overseas; 2. Real interest rates in the United States increase, while real interest rates abroad remain constant. 3. The Japanese put quotas and high tariffs on all imports from the United States. 4. Tourism from the United States increases sharply because of a fare war among airlines.