A $30-$year$-$maturity, $7\%$ coupon bond paying coupons semiannually is callable in five y

at a call price of $$1,100.$ The bond currently sells at a yield to maturity of $6\%(3\%$ per $h$

year$).$

a$.$ What is the yield to call?

b$.$ What is the yield to call if the call price is only $$1,050?$

c$.$ What is the yield to call if the call price is $$1,100$ but the bond can be called in two

years instead of five years?