Suppose you are trying to estimate the after tax cost of debt for a firm as part of the calculation of the Weighted Average Cost of Capital (WACC). The corporate tax rate for this firm is 39%. The firm's bonds pay interest semiannually with a 5% coupon rate and have a maturity of 6 years. If the annual yield to maturity of the bonds is 6.99%, what is the after tax cost of debt for this firm?