Problem 1-42 (LO 1-4) Havel and Petra are married and will file a joint tax return. Havel has W-2 income of $39,008, and Petra has W-2 income of $46,977. 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. a. Tax liability using Tax Tables b. Tax liability using Tax Rate Schedule