a bond with a face value of $1,000 has 12 years until maturity, has a coupon rate of 5.4%, and sells for $1,087. a. what is the current yield on the bond? (enter your answer as a percent rounded to 2 decimal places.) b. what is the yield to maturity if interest is paid once a year? (do not round intermediate calculations. enter your answer as a percent rounded to 4 decimal places.) c. what is the yield to maturity if interest is paid semiannually? (do not round intermediate calculations. enter your answer as a percent rounded to 4 decimal places.)