Required: a. Taxpayer A's taxable income is $122,500. Compute A's tax and average tax rate. What is A's marginal tax rate? b. Taxpayer B's taxable income is $210,000. Compute B's tax and average tax rate. What is B's marginal tax rate? Complete this question by entering your answers in the tabs below. Taxpayer A's taxable income is $122,500. Compute A's tax and average tax rate. What is A's marginal tax rate? Note: Round your percentage answers to 2 decimal places and other answers to the nearest whole dollar amount. Taxpayer B's taxable income is $210,000. Compute B's tax and average tax rate. What is B's marginal tax rate? Note: Round your percentage answers to 2 decimal places and other answers to the nearest whole dollar amount