LOL...yea it's always better to call and ask...WHY?
1) you get to know the answer / result on the spot.
2) from the phone conversation, you would be able to roughly know what kind of person are working there (nice / impolite?)
3) if you were to email, you might need to wait in anxiety. what if your mail did not reach them and ended up in the junk mail?

Actually, if you want sample answer, try googling some general samples might appear and you could use them as a template and improvise on it...

But since you already have sample questions in your mind...i would suggest you to take some time off to think of your own answer rather than remembering it..in that way it would sound more natural and also reflects your own personality as well