Rumolt Motors has 63 million shares outstanding with a share price of $32 per share. In addition, Rumolt has issued bonds with a total current market value of $515 million. Suppose Rumolt's equity cost of capital is 9%, and its debt cost of capital is 6%. 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.)