Sarah is going to watch a movie with her friend Dora. Dora who is a beautiful and smart girl loves her friend. They are both extremely excited for meeting each other. Sarah wanted to surprise her friend and have a birthday part, so she arranged this plan for her friend, and she invited all of her other friend for Dora's birthday.
In sentence 1 : Her friend points to Sarah's friend
In sentence 2 : Her friend points to Dora's friend who is Sarah
In sentence 3 : They are both extremely is a subject verb agreement
In sentence 4 : her other friends points to Sarah's friend which she invited to Dora's birthday party.
All right but, instead of "all of her other friend" - "all of her other friends" - and instead of " which" whom should be correct.