Assume that you are on the financial staff of Vinson Enterprises, and you have collected the following data: The yield to maturity on the company's outstanding 6.5% annual coupon bonds is 5.5%, and its tax rate is 35%. The risk-free rate is 2.5%, the market risk premium (r_M = I_RF) is 5.75%, and the firm's beta is 0.85. The firm's capital structure consists of 40% debt and 60% equity. What is Vinson's WACC