2. Susan and Stan Britton are a married couple who file a joint income tax return, where the tax rates are based on the tax tables presented. Assume that their taxable income this year was $375,000. Single Individuals Your Taxable Income is Up to 59.225 59.225-537450 537A50-590.750 590,750-5189.750 $189.750-5411.500 5411.500-5413.200 Over 5413.200 You Pay This Plus This Percentage Average Tax Amount on the on the Excess over the Rate at Base of the Bracket Base (Marginal Rate) Top of Bracket 5 0 100% 100% 922.50 150 13.8 5,156.25 25.0 204 18.481.25 28.0 243 46,07525 33.0 119.401.25 350 29.0 119.996.25 396 396 290 Married couples Filing Joint Returns You Pay This Plus This Percentage Average Tax Your Taxable Amount on the on the Excess over the Rate at Income is Base of the Bracket Base (Marginal Rate) Top of Bracket Up to 518.450 5 0 100% 100% 518,450-574,900 1.845.00 15.0 138 $74.900-5151,200 10,312.50 25.0 194 5151,200-5230,450 29,387.50 28.0 224 5230.450-5411.500 51327.50 27.1 5411.500-5464,850 111.324.00 35.0 280 Over 5464.850 129,996.50 39.6 396 33.0 a. What is their federal tax liability? b. What is their marginal tax rate? c. What is their average tax rate