Cost of Debt 1

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 37%. The firm's bonds pay interest semiannually with a 5.2% coupon rate and have a maturity of 9 years. If the annual yield to maturity of the bonds is 8.65%, what is the after tax cost of debt for this firm?

The correct answer is 5.45. Show step by step how I arrive at this answer.