Kennesaw Inc. has 10,000 bonds and 400,000 shares outstanding. The bonds have a 10% annual coupon (payable annually), $1,000 face value, $1,050 market value, and 10-year maturity. The beta on the stock is 1.30 and its price per share is $40. The riskless return is 6%, the expected market return is 14%, and the firm's tax rate is 40%. What is the after-tax cost of debt financing? (Enter your answer as a percentage accurate to TWO (2) decimal places)