Suppose that TNT, Incorporated has a capital structure of 43 percent equity, 23 percent preferred stock, and 34 percent debt. If the after-tax component costs of equity, preferred stock and debt are 15.4 percent, 10 percent and 7 percent, respectively, what is TNT's WACC if the firm faces an average tax rate of 21 percent? Mulliple Choice 9.45 percent 1130 percent 1064 percent