Jennifer and Paul, who file a joint return, have taxable income of $139,475 and the following tax liability: Their marginal tax rate is: Multiple Choice 13% 16% 10% Havel and Petra are married and will file a joint tax return. Havel has W-2 income of $38,868, and Petra has W-2 income of $49,671 Use the appropriate Tax Tables and Tax Rate Schedules. Required: a. What is their tax liability using the Tax Tables? b. What is their tax liability using the Tax Rate Schedule? Note: Round your intermediate computations and final answers to 2 decimal places