Mary Jarvis is a single individual who is working on filing he r tax return for the previous year. She has assembled the following relevant information:

$-$ she recieved $$80,000$ in salary

$-$ she recieved $$17,500$ of dividen income

$-$ she recieved $$22,000$ from the sale of disney stock that was purchased $2$ years prior to the sale at a cost of $$6,800$

$-$she recieved $$12,000$ from the sale of google stock that was purchased $6$ months prior to the sale at a cost of $$6,000.$

$-$Mary recieves one exemption $($$$4,000),$ and she had allowable itemixed deductions of $$7,500.$ These amounts will be deducted from her gross income to determine her taxanle income.

a$.$ What is Mary's federal tax liability? Round your answer to the nearest cent. Do not round intermediate calculations.

$

b$.$ What is her marginal tax rate? Round your answer to $1$ decimal place.

$\%$

c$.$ What is her average tax rate? Round your answer to $2$ decimal places.

$\%$