Study the rule and choose the correct words
"Whose" and "who's"
Whose:

Whose is this skateboard? — It's Ben's. It's his skateboard.

Who's = who is:

Who's (Who is) Ben? — He's my brother.

[Whose|Who's] Ms Stewart? — She's my teacher.

[Whose|Who's] is this scarf? — It's my grandma's.

[Whose|Who's] are these pencils? — They are Lily's.

[Whose|Who's] this man? — He's my uncle Joe.

[Whose|Who's] your best friend? — My best friend is Kate.

[Whose|Who's] is this house? — It's Mr Brown's house.