Westbrook's Painting Co. plans to issue a $1,000 par value, 20-year noncallable bond with a 7.00% annual coupon, paid semiannually. The company's marginal tax rate is 25%, but Congress is considering a change in the corporate tax rate to 15%. By how much would the component cost of debt used to calculate the WACC change if the new tax rate was adopted? 0.57% 0.63% 0.70% 0.77% 0.85%