a 25-year maturity, 9.0% coupon bond paying coupons semiannually is callable in six years at a call price of $1,150. the bond currently sells at a yield to maturity of 8.0% (4.00% per half-year). required: a. what is the yield to call? (do not round intermediate calculations. round your answer to 2 decimal places.) b. what is the yield to call if the call price is only $1,100? (do not round intermediate calculations. round your answer to 2 decimal places.) c. what is the yield to call if the call price is $1,150 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.)