Quantitative Problem: Barton Industries expects that its target captal structure for raising funds in the future for its capital budget will consist of 40% debt, 5% preferred stock, and 55% common equily. Note that the firm's marginal tax rate is 25%. Assume that the firm's cost of debt, r4 is 10.5%, the firm's cost of preferred stock, rp, is 9.7% and the common equity? Do not round intermediate calculations. Round your answer to two decimal places. What is the firm's weighted average cost of capital (WACC) if it has to issue new common stock? Do not round intermediate calculations. Round your answer to two decimal places