Ancient greek olympics

In an ancient Greek Olympics there was a mystery competition a bit like a Triathalon called a                                           

Pentathlon in which athletes competed in running, long-jump, discus, javelin and wrestling.

It first appeared at the Olympics in 708 BC. We do not know how people won or the order of the events except we do know that wrestling came last. Which order do you think they competed in and how might they have decided who won overall?