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13. Walmart has equity, debt, and preferred equity. The equity beta of this firm is 1.2 . The expected return of another stock with beta of 1.4 is 16%, and the risk-free rate is 2%. There are three different issues of debt with details below: The required rate of return for preferred equity is 8%. The total amount of equity is $10B, and the total amount of preferred equity is $2B. (1) What is the required rate of return for equity? (1 point) (2) What is the average required rate of return for debt (weighted by value)? (2 points) (3) What is the firm's WACC? (2 points)