Suppose a firm has a bond issue currently outstanding that has 27 years left to maturity. The coupon rate is 7.25% and coupons are paid semi-annually. The bond is currently selling for $975 per $1,000 bond. The firm faces a 40% tax rate. What is the firm's effective cost of debt? a) 5.22% Ob) 3.73% c) 7.61% d) 3.04% C Th bo bo e) 4.56% gro