1) (14 points) El is a single retiree who receives Social Security benefits of $15,000, tax-exempt interest of $3,900, taxable interest of $2,200, and a taxable pension for 2022 . Determine the amount of taxable Social Security benefits assuming her annual taxable pension is 3 answers need to be provided and be sure to show all alternate answers/calculations): a. $13,500. b. $20,750. c. $42,000