Can someone help me with this but please provide an explanation im just not understanding this

Laurel, Inc., has debt outstanding with a coupon rate of 5.8% and a yield to maturity of 7.2%. Its tax rate is 35%. What is Laurel's effective (after-tax) cost of debt? NOTE: Assume that the debt has annual coupons and that the firm will always be able to utilize its full interest ta shield. The effective after-tax cost of debt is \%. (Round to four decimal places.)