Prefer + Infinite

Hi! Are number 1 2 3 4 and 5 OK? Also are the underlined for number 5 adverbs? Thanks, Fulvio

1. I prefer to cook the meat well done rather than rare.

2. I prefer to cook the meat well done instead of rare.

3. I prefer cooking the meat well done to rare.

4 I prefer to cook the meat well done to rare.

5. Would you prefer the meat to be cooked well done to rare?

6. He plays tennis very well.