Restex has a debt-equity ratio of 0.63, an equity cost of capital of 17%, and a debt cost of capital of 7%. Restex's corporate tax rate is 21%, and its market capitalization is $253 million. a. If Restex's free cash flow is expected to be $6 million one year from now and will grow at a constant rate, what expected future growth rate is consistent with Restex's current market value? b. Estimate the value of Restex's interest tax shield