Rumolt Motors has 30 million shares outstanding with a share price of $15 per share. In addition, Rumolt has issued bonds with a total current market value of $150 million. Suppose Rumolt's equity cost of capital is 10%, and its debt cost of capital is 5%. a. What is Rumolt's pre-tax WACC? b. If Rumolt's corporate tax rate is 21%, what is its after-tax WACC? a. What is Rumolt's pre-tax WACC? Rumolt's pre-tax WACC is (%. (Round to two decimal places.)