Please answer the following, based on the information provided for the firm ABC: the company finances its operations and growth opportunities, using common equity, debt, and preferred equity. It issued a 10 year, 6 percent (coupon rate of 6%) bonds 3 years ago. This annual-coupon bond is currently selling for $980, and its face value is $1000. What comes closest to ABC's pre-tax cost of debt? 5% 8% 3% 6% 4%