A firm plans to sell 12 million shares of common stock and 200,000 bonds. Each bond will have a coupon rate of 5% and will have a face value of $1,000. The common stock will be issued at a price of $19.50 a share. The bonds will sell for 89% of face value. The after-tax cost of debt is 4% and the cost of equity is 9.275%. What is the firm's WACC? O 6% O 7% O 8% O 9%