O'Brien Ltd.'s outstanding bonds have a \$1,00o par value, and they mature in 15 years. Their nominal annual, not semiannual yield to maturity is 9.00\%, they pay interest semiannually, and they sell at a price of $875. What is the bond's nominal coupon interest rate? Do not round your ntermediate calculations. a. 7.47% b. 6.83% c. 3.73% d. 7.14% e. 3.57%