The latest year's balance sheet of company V has the following data: n v tnh: billion dong asset value liability value + 1. current asset 30,9 1. short term debt 29,07 2. fixed asset 55,05 2. long term debt 25,38 3. preferred stock 4,5 4. common stock 27 Total asset 85,95 Total liability and equity 85,95 Of these, some short-term debt does not have any costs, and the average cost of short-term debt is 5%. The pre-tax cost of long-term debt is 12%. The required rate of return on preferred stock is 15%. The company's estimated B coefficient is 0.8, the market risk-reward ratio is 6%, and the long-term national bond's rate of return is also 8%. Assume the weighting of the company's accounting value according to the above balance sheet is equivalent to its market value weight and the company's income tax rate is 20%. Request: 1. Calculate the cost of capital components: short-term debt, long-term debt, preferred shares and common shares. 2. Calculate the company's WACC