Hamilton Company's 12.4 percent coupon rate, semiannual payment, $1,000 par value bond, which matures in 15 years, currently sells at a price of $1318.16. The company's tax rate is 31 percent. Based on the nominal interest rate, not the EAR, what is the firm's after-tax cost of debt for purposes of calculating the WACC? O 5.43% 6.43% 4.43% 5.93% 4.93%