The one-year forward rate for the British pound is £0.6781 = $1. The spot rate is £0.6789 = $1. The interest rate on a risk-free asset in the UK is 4.6 percent. If interest rate parity exists, what is the one-year risk-free rate in the U.S.?
4.68 percent
4.72 percent
4.77 percent
4.83 percent