8 is either designed to annoy or not a question worthy of answering.
12 is wrong, as explained in other commends.
29 makes unknowable assumptions on moving up or down in position and does not take into account a tie for any place. You get bumped up from 9th (to 8th) when someone is demoted to 9th; but you get bumped down from 8th when someone is promoted. Why would I assume that way instead of up both times? (or down both times). Rules of the race need to be explained.