5. determine whether or not the following relation is an equivalence relation on the set of all major league baseball teams. provide justification. r={(x, y)|x and y are on the american league west division if you are unfamiliar with major league baseball, here is a brief explanation. all of the 30 professional baseball teams are divided into six divisions, each with five teams; the american league east, american league west, american league central, national league east, national league west, and national league central.