Rumolt Motors has 52 million shares outstanding with a price of $42 per share. In addition, Rumolt has issued bonds with a total current market value of $2,500 million. Suppose Rumolt's equity cost of capital is 10%, and its debt cost of capital is 7%. a. What is Rumolt's pretax weighted average cost of capital? b. If Rumolt's corporate tax rate is 28%, what is its after-tax weighted average cost of capital? a. What is Rumolt's pretax weighted average cost of capital? Rumolt's pretax weighted average cost of capital is \%. (Round to two decimal places.)