How do I solve b. and c.?

ary Jarvis is a single individual who is working on filing her tax return for the previous year. She has assembled the following relevant information: She received $120,000 in salary. She received $19,000 of dividend income. . She received $3,900 of interest income on Home Depot bonds. She received $22,500 from the sale of Disney stock that was purchased 2 years prior to the sale at a cost of $9,300. She received $8,500 from the sale of Google stock that was purchased 6 months prior to the sale at a cost of $5,900 . Mary only has allowable itemized deductions of $5,900, so she will take the standard deduction of $12,000 will be deducted from her gross income to determine her taxable Income Assume that her tax rates are based on Table 3.5. a. What is Mary's federal tax liability? Enter your answer as a positive value. Do not round intermediate calculations. Round your answer to the nearest cent. $ 140800 b. What is her marginal tax rate? Do not round Intermediate calculations. Round your answer to one decimal place. c. What is her average tax rate? Do not round Intermediate calculations. Round your answer to two decimal places. $43,800 b. 4a NI Add back: Non-cash op. exp Tot (316,000 - 10,000+ 70.005) 33.000 $76,600 Increase in neo&ink $70,000 Incr in accruals $70,000 Cash flow from oper act $16,000 Gross Inc Salary $120.000 Div inca 19.000 Int inc 3,900 Gain DIS stock (822.500-89300) 132.00 Gain Google Stock (3500-5900)_3600 158700 Exemptions and allowables deot 5900- 12000 Exemptions $140468 Taxable inc