4. Mary takes a full-time position that pays a salary of $64,500 per year. a) What is her pre-tax monthly income? b) The government takes out 6.2% for Social Security, 1.45% for Medicare, and 15% for federal income tax. She does not live in a state with state income tax. What is her after-tax monthly income? 5. Scott takes a full-time position that pays an hourly wage of $28. The job assumes that he will work five 8-hour days a week. Use the tax info in #4. a) What is his gross annual income? b) What is his gross monthly income? Assume four weeks in a month c) What is his after-tax monthly income? 6. Steven takes a sales job that pays 5.25% commission. He typically sells $86,000 worth of merchandise per month.a) What is his gross annual income? b) What is his gross monthly income? c) What is his after-tax monthly income?