4. The following is a simplifi ed version of the actual Arizona state tax tables, for married filing jointly taxable incomes up to $49,999. For 2017, a married filing jointly person whose taxable income is between SO-S 19,999 is charged 2.59% in tax. A married filing jointly person whose taxable income is between $20,000-$49,999 is charged 2.59% of the first $19,999, and 2.88 % of the amount over $19,999. Write a piecewise-linear function to represent the AZ state income tax for a married jointly taxpayer as a function of taxable income, for taxable incomes up to $49,999. Graph this function. Note that these are referred to as "tax brackets". The actual tax brackets for the state of AZ in 2017 is given in the table below: filing Tax Bracket $0.00+ $20,000.00+ $50,000.00+ $100,000.00+ $300,000.00+ Tax Rate 2.59% 2.88% 3.36% 4.24% 4.54%