Three Waters Company (TWC) can borrow funds at an interest rate of 10.20% for a period of seven years. Its marginal federal-plus-state tax rate is 25%. TWC's after tax cost of debt is 7.65% (rounded to two decimal places), At the present time, Three Waters Company (TWC) has 15-year noncallable bonds with a face value of $1,000 that are outstanding. These bonds have a current market price of $1,329.55 per bond, carry a coupon rate of 12%, and distribute annual coupon payments. The company incurs a federal plus-state tax rate of 25%. IF TWC wants to issue new debt, what would be a reasonable estimate for its after-tax cost of debt (rounded to two decimal places)? (Note: Round your YTM rate to two decimal place.) 7.31% O 7.00% 4.87% 6.09%