A firm has a capital structure containing 60% debt and 40% common stock. its outstanding bonds offer investor a 6.5% yield to maturity. The risk-free rate currently equals 5% and the expected risk premium on the market portfolio equal 6%. The firm's common stock bet a is 1.20

(a) What is the firm's required return on equity?

(b) Ignoring taxes, use your finding in part (a0 to calculate the firm's WACC

(c) Assuming a 40% tax rate, recaculate the firms WACC found in part (b)

(d) Compare and contrast the values for the firm's WACC found in part (b) and (c)