Federal income tax question

Personal and Dependency Exemptions (LO 1.6) In each of the following situations, determine whether the taxpayer(s) has/have a dependent and if so, the total amount of the child tax credit and other dependent credit (assuming no limitations apply). If an amount is zero, enter "0". Dependent? (Yes/No) Amount of credit a. Donna, a 20-year-old single taxpayer, supports her mother, who lives in her own home. Her mother has income of $1,350. b. William, age 43, and Mary, age 45, are married and support William's 19-year-old sister, who is not a student. The sister's income from a part-time job is $4,200. 000 c. Devi was divorced in 2018 and receives child support of $250 per month from her ex-husband for the support of their 8-year-old son, John, who lives with her. Devi is 45 and provides more than half of her son's support. d. Wendell, an 89-year-old single taxpayer, supports his son, who is 67 years old, lives with him and earns no income. e. Wilma, age 65, and Morris, age 66, are married. They file a joint return