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 in the

chapter. Assume that their taxable income this year was $$375,000.$

$($a$)$ What is their federal tax liability?

$($b$)$ What is their marginal tax rate?

$($c$)$ What is their average tax rate?

Married Couples Filing Joint Returns