If Lehigh loses Wednesday, it gets messy, but oddly enough they could still finish anywhere from 1st to 4th. Finishing in 1st would involve a weird 3-way tie with Bucknell and BU and Colgate finishing in 4th, but I think it is possible..
Not possible. In a 3-way tie, Bucknell has the tiebreaker. Whoever finished 4th would be irrelevant.