Question 8 5 pts A firm has $90 million of bonds outstanding. The bonds have 7.8% annual coupon rate, pay semiannual coupons, and have 19 years to maturity. They sell for 137% of pary What is the firm's pretax cost of debt, expressed as an EAR? Enter a number as a percentage with three digits after the decimal, such as 6.374 if the answer is 6.374%