Holmes' outstanding bonds have an 8.5% annual coupon payment and will mature in 10 years. The bonds are currently selling for $957.50 If the company can issue new bonds at par with similar YTM, what is Holmes' before-tax cost of debt? If Holmes' marginal tax rate is 25%, what is Holmes' after- tax cost of debt? 9.45%; 7.09% 8.50%; 6.38% O 8.84%; 6.63% O 9.17%; 6.88% O 10.05%; 7.54%