Timmy Tappan is single and had $$172,500$ in taxable income. Use the rates from Table $2\mathrm{.}3.$

a$.$ Calculate his income taxes. $($Do not round intermediate calculations and round your answer to the nearest whole number, e$.$g$.,32.)$

b$.$ What is the average tax rate? $($Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

c$.$ What is the marginal tax rate? $($Do not round intermediate calculations and enter your answer as a percent rounded to the nearest whole number, e$.$g$.,32.)$

$\backslash$table$[[$a$.$ Income taxes,$],[$b$.$ Average tax rate,$\%$