Susan and Stan Britton are a married couple who file a joint income tax return, where the tax rates are based on the tax table 3.5. Assume that their taxable income this year was $390,000. Do not round intermediate calculation.

1. What is their federal tax liability? Round your answer to the nearest dollar.

   $

2. What is their marginal tax rate? Round your answer to the nearest whole number.

   %

3. What is their average tax rate? Round your answer to two decimal places.

   %