In each of the following independent situations, determine Winstons filing status for 2020. Winston is not married.

1. Winston lives alone, but he maintains a household in which his parents live. The mother qualifies as Winstons dependent, but the father does not.

2. Winston lives alone but maintains a household in which his married daughter, Karin, lives. Both Karin and her husband (Winstons son-in-law) qualify as Winstons dependents.

3. Winston maintains a household in which he and a family friend, Ward, live. Ward qualifies as Winstons dependent.

4. Winston maintains a household in which he and his mother-in-law live. Winstons wife died in 2019.

5. Same as part (4), except that Winstons wife disappeared (i.e., she did not die) in 2018.