plz help

Gaul, Inc. is trying to determine its cost of debt. The firm has bonds outstanding with 29 years to maturity and a current price of $1050 per bond. The bonds make semiannual payments, have a face value of $1000, and have a coupon rate of 5 percent. If the tax rate is 23 percent, what is the after-tax cost of debt? 0 3.61% 04.05% O 5.80% O 4.22% 0 2.91%