An employee works 45 hours (45 - 40 were overtime hours) during a workweek in December of 2021. He earns $41.50/hour, with his employer paying 1.5 times the regular rate of pay for overtime hours. To date, he has earned $142,200 during the year. He has requested that his employer withhold 6% of gross pay, which is to be contributed to a 403(b) plan. Taxable income for federal income tax withholding = $? Taxable income for social security tax = $? Taxable income for medicare tax = $?