A bond with a face value of $1,000 has 12 years until maturity, has a coupon rate of 6.4%, and sells for $1,097. a. What is the yield to maturity if interest is paid once a year? Note: Do not round intermediate calculations. Enter your answer as a percent rounded to 4 decimal places. b. What is the yield to maturity if interest is paid semiannually? Note: Do not round intermediate calculations. Enter your answer as a percent rounded to 4 decimal places