Joe and Jane Keller are a married couple who file a joint income tax return, where the

Question:

Joe and Jane Keller are a married couple who file a joint income tax return, where the tax rates are based on the tax tables presented in the chapter. Assume that their taxable income this year was $165,000.
a. What is their federal tax liability?
b. What is their marginal tax rate?
c. What is their average tax rate?