Please need explanation in terms of language and social contexts to decide which of the following sentences are incorrect, according to perspective rules !

1- anyone who has finished their work should stay in their seat.

2- Whom do you want to speak to?

3-who do you want to speak to?

4-Hopefully, it will be warm tomorrow.

5-The professor gave the paper to Tony and I.

1. Between you and I, I think this is a waste of time.
2. The union leader, along with all of her followers, want to talk to you.

How to answer it just indicate correct or not? Or provide