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 filing separately with a taxable income of $120,000 c.) a married couple filing 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: . Gross income: $75,000 . Adjustments: $4,000 . Deductions: O $28,000 mortgage interest 0 $4,200 property taxes 0 $3,000 charitable contributions . Tax credit: None . Standard Deduction: $6,300 . Exemptions: $4,500