PSb 3-4 Calculate Federal Income Tax Withholding Using the Percentage Method For each employee listed, use the percentage method to calculate federal income tax withholding. Refer to Appendix A, 2018 Federal Tax Tables in your textbook. NOTE: For simplicity, all calculations throughout this exercise, both intermediate and final, should be rounded to two decimal places at each calculation. 1:Juan Hoffman (single; 2 federal withholding allowances) earned weekly gross pay of $445. Federal income tax withholding = $ 2:William Harrison (single; 1 federal withholding allowance) earned biweekly gross pay of $990. He contributes $75 to a flexible spending account during the period. Federal income tax withholding = $ 3:Loretta Goulet (married; 3 federal withholding allowances) earned monthly gross pay of $2,800. For each period, she makes a 401(k) contribution of 14% of gross pay. Federal income tax withholding = $ 4:Louise Simpson (married; 9 federal withholding allowances) earned semimonthly gross pay of $2,300. She contributes $100 to a cafeteria plan during the period. Federal income tax withholding = $