This is my family.My grandpa's name is Harry Brown.My grandma's name is Jean Brown.

This is my family.My grandpa's name is Harry Brown.My grandma's name is Jean Brown.
My father's name is Jeff Brown. My mother's name is Helen Brown. Jeff and Helen are my parents,I have a sister. Her name is Kate Brown.My name is Tom Brown.I am ten.my sister is eight.
回答下列问题
1What is Tom's family name?
2Is Helen Brown Tom's grangmother?
3.Is Jeff Brown his sister?
4.How old is his sister?
2.Is Helen his sister?
3.Is Jeff Brown his grangmother?