For each of the following situations, indicate whether the taxpayer(s) is/are) required to file a tax return for 2020. Explain your answer. a. Debra, age 68, and Jerry, age 70, are married and file a joint return. They received $24,500 in interest income from a savings account. b. Margie is a single taxpayer with wages of $8,400 and interest income of $200. c. Janie, age 30, and Scott, age 28, are married and file a joint tax return. They had $17,000 in earnings from wages. d. Kim, age 20, is a single college student who is claimed as a dependent by her parents. She earned $2,000 from a part-time job and has $450 in interest income. e. Sefanie, a 25-year-old single taxpayer, has wages of $1,500, from which $80 of federal income tax was withheld