A $30-$year maturity, $8\mathrm{.}3\%$ coupon bond paying coupons semiannually is callable in five years at a call price of $$1,115.$ The bond currently sells at a yield to maturity of $7\mathrm{.}3\%(3\mathrm{.}65\%$ per half$-$year$).$

Required:

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

Yield to call

$8\mathrm{.}05$:$\%$

b$.$ What is the yield to call if the call price is only $$1,065?($Do not round intermediate calculations. Round your answer to $2$ decimal places.$)$

Yield to call

$8\mathrm{.}28\%$

c$.$ What is the yield to call if the call price is $$1,115$ but the bond can be called in two years instead of five years? $($Do not round intermediate calculations. Round your answer to $2$ decimal places.