Rumolt Motors has 68 million shares outstanding with a price of $28 per share. In addition, Rumolt has issued bonds with a total current market value of $2149 million. Suppose Rumolt's equity cost of capital is 15%, and its debt cost of capital is 11%. If Rumolt's corporate tax rate is 38%, what is its after-tax weighted average cost of capital? a. 11.59% b. 10.66% c. 13.60% d. 13.25% e. 10.45%