Determine the tax liability, marginal tax rate, and average tax rate in each of the following cases. Use the appropriate Tax Tables and Tax Rate Schedules. a. Married taxpayers, who file a joint return, have taxable income of $25,151. b. Single taxpayer, has taxable income of $94,642. (Use the tax tables to compute tax liability. For all requirements, round "Average tax rate" to 2 decimal places.) Tax liability Marginal tax rate Average tax rate a. % % b % % Determine the tax liability, marginal tax rate, and average tax rate in each of the following cases. Use the appropriate Tax Tables and Tax Rate Schedules. a. Married taxpayers, who file a joint return, have taxable income of $25,151. b. Single taxpayer, has taxable income of $94,642. (Use the tax tables to compute tax liability. For all requirements, round "Average tax rate" to 2 decimal places.) Tax liability Marginal tax rate Average tax rate a. % % b % %