The zero coupon bonds of Mark Enterprises have a market price of $394.47, a face value of $1,000, and a yield to maturity of 6.87 percent based on semiannual compounding. How many years is it until this bond matures? a. 10.49 years b. 13.77 years c. 12.64 years d. 11.08 years e. 15.42 years