Based on the amounts of taxable income provided, compute the federal income tax payable in 2017 on each amount assuming the taxpayers are married filing a joint return. Also, for each amount of taxable income, compute the average tax rate and the marginal tax rate.

Taxable income of $50,000.

. Taxable income of $125,000.

. Taxable income of $380,000.

. Taxable income of $510,000