A 20-year maturity, 7.0% coupon bond paying coupons semiannually is callable in seven years at a call price of $1,200. The bond currently sells at a yield to maturity of 6.0% (3.00% 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 $1,150? (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 $1,200 but the bond can be called in four years instead of seven years? (Do not round intermediate calculations. Round your answer to 2 decimal places.)

Yield to call %

please show work