ll bean has debt with a market value of 2500000 preferred stock with a market value of 2,500,000 preferred stock with a market vale of $600,000 and common stock with a market value of $5,000,000. if debt has a before-tax cost of 7%, preferred stock at a cost of 8%, common stock at a cost of 10%, and the firm has a tax rate of 35% what is the WACC?

a 12.57%

b 9.48%

c 7.33%

d 8.17%