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b. A married couple filing separately, one spouse with taxable income ofs45,885 and the other with S58,218. c. A head of household with taxable income of$98,592 28. A married couple, who files a joint return received s9,800 of social security benefits. a. Calculate the taxable amount of benefits if the couple's provisional income is $22,000 b. Calculate the taxable amount of benefits if the couple's provisional income is $39,500 c. Calculate the taxable amount of benefits if the couple's provisional income i $59,000 29. Determine the tax liability, marginal tax rate, and average tax rate in each of the following cases. a. Single taxpayer, taxable income ofS33,976. b. Single taxpayer, taxable income ofs67,260