Required: Determine the tax liability, marginal tax rate, and average tax rate in each of the following eases. Use the appropriate Tax Tables and Tax Rate Schedules. a. Single taxpayer, taxable income of $37150. b. Single taxpayer, taxable income of $90,953. (For all requirements, use the tox tables to compute tox liability. Round "Average tax rate to 2 decimal places.) Tax liability Marginal tax rate Average tax rate a b 90