exchange rates help please

Questions points A Detroit investor purchased a $100,000 Canadian dollar CD in Windsor, Canada 180 days ago at a rate of 7 percent. The Canadian spot rate was 1.367 C$/U.S.$ when the investment was made. If the U.S. Investor had purchased a 180 day forward foreign exchange contract for 1.385 CS/U.S.S. what equivalent U.S. annual rate 180 days ago would have made the investor indifferent between a Detroit bank CD and the Windsor, Canada CD above? 5.53 percent OB 3.50 percent oc 7.00 percent 4.16 percent