Donna, a $20-$year$-$old single taxpayer, supports her mother, who lives in her own home. Her mother has income of $$1,350.$

Yes

$fill in the blank $2$

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 $$4,700.$

$fill in the blank $4$

c$.$ Devi was divorced in $2021$ 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.

$fill in the blank $6$

d$.$ Wendell, an $89-$year$-$old single taxpayer, supports his son, who is $67$ years old, lives with him and earns no income.

Yes

$fill in the blank $8$

$0$

e$.$ Wilma, age $65,$ and Morris, age $66,$ are married. They file a joint return.