-Please show work

5. Avicorp has a $10 million debt issue outstanding, with a 6% coupon rate. The debt has semiannual coupons, the next coupon is due in six months, and the debt matures in five years. It is currently priced at 95% of par value. a. What is Avicorp's pretax cost of debt? b. If Avicorp faces a 40% tax rate, what is its after-tax cost of debt