Question with Possible answers to calculate the WACC, thanks

Using the WACC in practice: Swirlpool, Inc., has found that its cost of common equity capital is 18 percent, and its cost of debt capital is 8 percent. If the firm is financed with 60 percent common shares and 40 percent debt, then what is the after-tax weighted average cost of capital for Swirlpool if it is subject to a 40 percent marginal tax rate?

14.00%

10.37%

12.00%

12.72%