A and B please

Avicorp has a $14.3 milion debt issue outstanding, with a 5.9% 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 96% of par value. a. What is Avicorp's pre-tax cost of debx? Note: Compuse the effective annual return. b. If Avicorp faces a 25% tax rate, what is its ater-tax cost of debt? Note: Assume that the firm will always be able to utize its full interest tax shield. a. The cost of debt is 16 per year, (Round to four decimal places:)