Stone Corporation's bonds have 10 years to maturity, an 6.75% coupon paid semiannually, and a $1,000 par value. The bond can be called in 3 years at a price of $1,100. If the bond's nominal yield to call is 6.50%, what is the bond's nominal yield to maturity? 5.21% 5.57% 6.66% 6.77% 7.11%