Stancorp has a $12.5 million debt issue outstanding, with a 5.9% coupon rate. The debt has semi-annual coupons, with the next coupon is due in six months. The debt matures in five years. It is currently priced at 95% of par value. a. What is Stancorp's pre-tax cost of debt? Note: Compute the effective annual return. b. If Stancorp faces a 30% tax rate, what is its after-tax cost of debt