4. (7%) A firm is proposing to undertake a scale expansion. It would cost $20 million and produce an expected cash flow of $3 million a year in perpetuity before it is taxed at the corporate rate of 34%. The firm is financed 30% by debt. The expected return on the firm's equity is 20% and the interest rate on its debt is 8%. What is the NPV of the project using the weighted average cost of capital