3. Use the marginal tax rate as provided in class to compute the tax owed by each person or couple. a.) a single man with a taxable income of $40,000 b.) a married woman ling separater with a taxable income of $120,000 c.) a married couple ling jointly with a taxable income of $250,000 and a $7,500 tax credit d.) a head of household with a taxable income of $58,000 and a $6,500 tax credit e.) A single person with no dependents with the following: 0 Gross income: $75,000 0 Adjustments: $4,000 0 Deductions: El $28,000 mortgage interest III $4,200 property taxes III $3,000 charitable contributions 0 Tax credit: None o Standard Deduction: $6,300 0 Exemptions: $4,500