An island is to be divided among five players a, b, c, d and e, using the claim-and-challenge method. they decide to proceed in a fixed order: a first, b second, etc. in all rounds. in the first round, b and d are the only challengers. in the second round, there are no challenges. in the third round, e is the only challenger.

1) who gets a piece of the island at the end of the first round?
2) who makes the initial claim in the third round?
3) in the last round, who has a chance to challenge?