A 25-year maturity, 8.7% coupon bond paying coupons semiannually is callable in six years at a call price of $1,135. The bond currently sells at a yield to maturity of 7.7% (3.85% per half-year).

a. What is the yield to call? (Do not round intermediate calculations. Round your answer to 2 decimal places.)

Yield to call %

b. What is the yield to call if the call price is only $1,085? (Do not round intermediate calculations. Round your answer to 2 decimal places.)

Yield to call %

c. What is the yield to call if the call price is $1,135 but the bond can be called in three years instead of six years? (Do not round intermediate calculations. Round your answer to 2 decimal places.)

Yield to call %