A Swiss bank converted 1 million Swiss francs to euros to make a euro loan to a customer when the exchange rate was 1.85 francs per euro. The borrower agreed to repay the principle plus 3.75% interest in 1 year. The borrower repaid euros at loan maturity and when the loan was repaid the exchange rate was 1.98 francs per dollar. What was the bank's franc rate of return? -2.82% 9.94% 5.71% 7.75% 11.04%