4. Mountain Retreat and Resort is undergoing a major expansion. The expansion will be financed by issuing new 15-year, 51,000 par, 9% annual coupon bonds. The market price of the bonds is $1,070 each. The firm's flotation expense on the new bonds will be $50 per bonc The firm's marginal tax rate is 35%. What is the relevant cost of the new bonds for capital budgeting purposes? O 8.45% O 5.69% O 5.14% 4.82%