Avicorp has a $13.9 million debt issue? outstanding, with a 6.2% coupon rate. The debt has? semi-annual coupons, the next coupon is due in six? months, and the debt matures in five years. It is currently priced at 93% of par value. a. What is? Avicorp's pre-tax cost of? debt? Note: Compute the effective annual return. (Round to 4 decimal places) b. If Avicorp faces a 40% tax? rate, what is its? after-tax cost of? debt?