4. a) Why is cost of capital significant? b) Akri Corporation has the following book value capital structure o 31st December, 2008. The expected after tax component costs of the various sources of finance for Akri limited are as follows: Suppose that the Akri Corporation has 45000 , equity shares outstanding and that the current market price per share is taka 20. Assume that the market values and the book values of the debt and the preference capital are the same. Calculate WACC of Akri limited, based on: i. Book value method and b. Market value method