The U.S. corporate tax rates are given in the following table. Suppose your firm earns $250,000 in taxable income. Please answer the following questions: What is the firm's tax liability? Show all calculations. Calculate the firm's average tax rate. What is the firm's marginal tax rate? If you are considering a project that will increase the firm's taxable income by $5,000, what tax rate average rate or marginal rate should you use in your analysis