Martin is married and claims four exemptions on his W-4. What is his federal income tax withholding under the following conditions? Assume that his employer uses the percentage method of withholding. Use withholding allowance and percentage method tables.

1. Martin is paid semimonthly, and his gross pay is $3,600 per paycheck.
2. Martin is paid monthly, and his gross pay is $6,700 per paycheck.
3. Martin is paid weekly, and his gross pay is $4,750 per paycheck.

(For all requirements, round your intermediate computations and final answers to 2 decimal places.)