What is the WACC for Cambridge International? Assume the followings: - the bonds have a yield to maturity of 5.5%. the cost of preferred shares are 4.5% and the cost of equity is 10.5% - the capital structure weights are debt 50%, preferred shares 10%, equity 40% - the firm's tax rate is 40%. None of the above 7.40% 10.15% 6.30% 9.13%