FIND HHI ONLY

You are trying to value a private company. The company has 4 million of debt and 4 million of book equity. The ratio of market value to book value for similar firms is 2. You decide to use this ratio to estimate the market value of equity. You have estimated that the firm's beta is 1.29. The corporate tax rate is 30%. The risk free rate is 4% and the market risk premium is 5.5%. The interest rate for the debt is 6%. What is your estimate of WCC of this firm? (Enter the answer in percentage There are only three firms in an industry. If these three firms agree to merge into one firm, what will be the HHI index for this industry