answer question 3,4

3. In 2018, Carmen was an employee at Stark Electronics and earned a salary of $90,000 and an electrical engineer. Also, in 2018, Carmen sold life insurance as an independent insurance agent which means she was self-employed in this business. She earned $15,000 in commissions in 2018 from selling insurance. If the OASDI cap in 2018 was $128,400, how much did Carmen pay into Social Security in 2018? Answers are rounded to the nearest whole dollar a. $6,510 b. $7,440 c. $8,033 d. $16,065 In 2018, Taxpayer X has taxable income of $126,000, is single and has no dependents. Also, in 2018, Taxpayer Y has taxable income of $30,000, is married and has five dependents. If Taxpayer pays more income tax in 2018 than Taxpayer Y paid in 2018, then this income tax system has: a Vertical Equity b. Horizontal Equity c. Upside Down Equity d. None of the above