4) A new firm (with no other assets or liabilities) makes an initial investment of $500 and expects to generate a before-tax gross return of $570 after one year. The firm is partially financed with $200 of debt at an expected return of 5%. The appropriate unlevered after-tax cost of capital is 13% and the marginal income tax rate is 21%. What is the approximate adjusted present value of the firm? a) $350 b) $400 c) $450 d) $500 e) $550 f) Other, specify.