The equilibrium exchange rate of the Swiss franc is $0.90. At an exchange rate $.83: a. U.S. demand for Swiss francs would exceed the supply of francs for sale and there would be a shortage of francs in the foreign exchange market. b. U.S. demand for Swiss francs would be less than the supply of francs for sale and there would be a shortage of francs in the foreign exchange market. c. U.S. demand for Swiss francs would exceed the supply of francs for sale and there would be a surplus of francs in the foreign exchange market. d. U.S. demand for Swiss francs would be less than the supply of francs for sale and there would be a surplus of Swiss francs in the foreign exchange market.