Use the following data to answer the question:

The company has a target capital structure of 40% debt and 60% equity. Bonds with face value of $1,000 pay a 10% coupon (semiannual), mature in 20 years, and sell for $849.54

The company stock beta is 1.2.

Risk-free rate is 10%.The average return on the market is 15%.

The company is a constant-growth firm that just paid a dividend of $2, sells for $27 per share, and has a growth rate of 8%.

The company's marginal tax rate is 40%.

a-Calculate the weighted average cost of capital (WACC )of the company

b-What happens to a company's weighted average cost of capital (WACC) if the firm's corporate tax rate increases?