JPR, Inc has one outstanding bond issue, which has seventeen years remaining to maturity and a coupon rate of 4.875%. Interest payments are made semi-annually, the firms tax rate is .40, and the bonds are currently trading at $928.00. a. What is the yield to maturity on the bonds? b. Ignoring flotation costs, what is the firms cost of debt (before tax)? c. What is its after-tax cost of debt?