sincere stationery corporation needs to raise ​$ to improve its manufacturing plant. it has decided to issue a ​$ par value bond with an annual coupon rate of percent with interest paid semiannually and a ​-year maturity. investors require a rate of return of percent. a. compute the market value of the bonds. b. how many bonds will the firm have to issue to receive the needed​ funds? c. what is the​ firm's after-tax cost of debt if the​ firm's tax rate is ​percent?