What's the best way to do part 3?
LISTEN to your partner. Don't just wait for your turn to speak. Be interested in what they are saying and politely agree or disagree. If you disagree, try to persuade them to change their opinion, but don't spend too long doing that. Refer back to things you already said.
Say a couple of sentences then ask a question. Never answer your own questions!
Look at your speaking partner instead of your assignment. Some students turn their chair a little bit - towards the other student. This helps them to remember who they should talk to.