A $25-$year maturity, $8\mathrm{.}4\%$ coupon bond paying coupons semiannually is callable in six years at a call price of $$1,120.$ The bond currently

sells at a yield to maturity of $7\mathrm{.}4\%(3\mathrm{.}70\%$ per half$-$year$).$

Required:

a$.$ What is the yield to call?

Note: 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 $$1,070?$

Note: Do not round intermediate calculations. Round your answer to $2$ decimal places.

Yield to call

$\%$