West Coast Bhd has the following capital structure, which it considers optimal. Additional information: - The 10-year bond with par value of RM1,000 is now selling at RM950 and is paid annually. The firm has to pay 5% underwriting and brokerage fees. - The market price of the firm's 12% RM100 par value preferred shares is RM110. Flotation cost of the new issue of preferred share is RM1.50 per share. - Last year's dividend on common shares was RM2.50 per share and is expected to grow at a constant rate of 6% per annum. Market price per share of common stock is RM22.50. The flotation cost is estimated to be 10% of the market price of the share. - The firm's tax rate is 25%. a) Compute the component costs of debt, preferred share and common share. (7 marks) b) Find the firm's weighted average cost of capital (WACC).