Помагите
A = possessive, B = is.

1 Kate's sister is a lawyer.
A

5 Their uncle's a pilot.

2 His mother's very short.
B

6 Jim's children wear glasses.

3 My cousin's flat is very big.

7 My brother's wife plays the piano.

4 Our grandfather's 70 today.

8 Her name's Christina.
with whose or who's​