Decide if the sentence is active (A) or passive (P) voice.

Source: dreamstime.com

1. _____ Someone stole my pen. 

2. _____ One must do one's duty.

3. _____ The fields are overgrown with grass.

4. _____ This bottle contains milk.

5. _____ The dinner should be cooked now.

6. _____ He is known to me.

What are the answers for points 5 and 6?