please dont copy and paste answer from another post because it is wrong. Please show work thank you.

it doesnt say this is all the question gives me. the 12% is correct

Refer to the Individual rate schedules in Appendix C. Required: a. What are the tax liability, the marginal tax rate, and the average tax rate for a married couple filing Jointly with $51,900 taxable Income? b. What are the tax liability, the marginal tax rate, and the average tax rate for a single individual with $197,200 taxable income? c. What are the tax liability, the marginal tax rate, and the average tax rate for a head of household with $446,300 taxable income? Complete this question by entering your answers in the tabs below. Required A Required B Required C What are the tax liability, the marginal tax rate, and the average tax rate for a married couple filing Jointly with $51,900 taxable income? (Round final "Tax liability" to the nearest whole dollar and "Average tax rate" to 2 decimal places.) Tax liability Marginal tax rate Average tax rate 12% % Required 8 >