To help finance a major expansion, Castro Chemical Company sold a noncallable bond several years ago that now has 20 years to maturity. This bond has a 9.25% annual coupon, paid semiannually, sells at a price of $1,075, and has a par value of $1,000. If the firm's tax rate is 35%, what is the component cost of debt for use in the WACC calculation? a. 5.51% b. 3.58% c. 4.83% d. 5.02% e. 8.47%