A firm is financed 63% by common stock, 6% by preferred stock and 19% by debt. The

required return is 16% on the common, 9% on the preferred, and 6% on the debt. If the tax rate

is 21% what is the WACC?

(Note : I know, weights on equity%+pref stock%+debt% are not added up to 100%, because Blackboard generates random numbers.)