Use Table 3.6. (Do not round intermediate calculations. Enter the average tax rate as a percent rounded to 1 decimal place.)

a. What would be the marginal tax rate for a married couple with income of $89,400?

b. What would be the average tax rate for a married couple with income of $89,400?

c. What would be the marginal tax rate for an unmarried taxpayer with income of $89,400?

d. What would be the average tax rate for an unmarried taxpayer with income of $89,400?

TABLE 3.6 Personal tax rates, 2018 Taxable Income ($) Single Taxpayers Married Taxpayers FilIng Joint Returns Tax Rate (%) $0-$9,525 $0-$19,050 10 $9,526-$38,700 $19,051-$77,400 12 $38,701-$82,500 $77.401-$165,000 22 $82,501-$157,500 $165,001-$315,000 24 $157,501-$200,000 $315,001-$400,000 32 $200,001-$500,000 $400,001-$600,000 35 $500,001 and above $600,001 and above 37TABLE 3.6 Personal tax rates, 2018 Taxable Income ($) Single Taxpayers Married Taxpayers FilIng Joint Returns Tax Rate (%) $0-$9,525 $0-$19,050 10 $9,526-$38,700 $19,051-$77,400 12 $38,701-$82,500 $77.401-$165,000 22 $82,501-$157,500 $165,001-$315,000 24 $157,501-$200,000 $315,001-$400,000 32 $200,001-$500,000 $400,001-$600,000 35 $500,001 and above $600,001 and above 37