1) Either "a" or "b"
Ehiter luis or pedro are mexican you can play either baseball or golf
2) Ehiter (noun)
I like either car Do you want Water or soda? i want either
3) Either of
Either of cars is fine
4) Either side
You can walk from either side
5) Either of (personal pronoun)
I think is either of them

-What do you want to eat? -i want either
1) Both "a" and "b"
- both luis and pedro are students - I speak both spanish and english
2) Both (of the)
Both of the students played soccer
3) Both of
Both of them traveled to USA
4) Both sides
Plase, check both sides

-What do you prefer to play? -i prefer both
1) Neither Pedro nor Carlos is a Doctor
2) Neither of us si American

-what do you like the most? -neither, thanks