Walter, Inc., is trying to determine its coal of debt The firm has a debt issue outstanding with 11 years to maturity that is quoted at 90 percent of face value The issue makes semiannual payments and has an embedded cost of 7 percent annually Note the embedded cost refers to the coupon rate. (a) What is the company's pretax cost of debt as an APR? (Do not round your Intermediate calculations. (b) If the tax rate is 37 percent, what is the after tax cost of debt as an APR? (Do not round your intermediate calculations.)