Hi Are they your parents?Mum,he is my classmate,Jack.Where i

Hi Are they your parents?Mum,he is my classmate,Jack.Where is he?who is your sister?
A Hi Are they your parents?Mum,he is my classmate,Jack.Where is he?who is your sister?
Are they your friends or sisters?
B
He is in the classroom.
Helen is my sister.
They are my sisters.
Yes,they are.
How are you ,jack?