5. Suppose that a certain state has 794,000 people. Let the gross income for the with person be denoted by G}, the taxes for the 21th person be denoted Ti, and the disposable income for the aim person be denoted 1),. Suppose that the mean gross income per year is $50,000, and the average taxes per year is $7500. (a) If the individual disposable income is the gross in- come minus taxes, write down the equation for 13,-. (b) Find the average disposable income per year for the entire state. (c) Find the total taxes per year for the entire state, and the total gross income for year for the entire state. (d) Find the total disposable income per year for the entire state