A $30-$year maturity, $8\%$ coupon bond paying coupons semiannually is callable in five years at a call price of $$1,100.$ The bond currently sells at a yield to maturity of $6\%(3\%$ per half$-$year$).$ a$.$ What is the yield to call annually? b$.$ What is the yield to call annually if the call price is only $$1,050?$c$.$ What is the yield to call annually if the call price is $$1,100$ but the bond can be called in two years instead of five years? $($Negative amounts should be shown with a minus sign. Do not round intermediate calculations. Round your answer to $3$ decimal places.$)$