Rumolt Motors has 49 million shares outstanding with a price of $16 per share. In addition, Rumolt has issued bonds with a total current market value of $342 million. Suppose Rumolt's equity cost of capital is 9%, and its debt cost of capital is 5%.

a. What is Rumolt's pretax weighted average cost of capital?

b. If Rumolt's corporate tax rate is 40%, what is its after-tax weighted average cost of capital?

A. Rumolt's pretax weighted average cost of capital is .....% ??

B....?