The anchor runner carries the baton the shortest distance of the four. All things (like starting ability and curve running) being equal, ideally your fastest runner should lead off--the first runner carries the baton the longest.
Clearly you are a distance guy.
It depends on th estrength of the team. Usually they make the curve guys run the shortest. The second leg is usually the longest in most iterations.
For your education. The legs are all 100 m, with the international zone the same distance behind the back of the box. There are plenty of things happening in the change and the only constant is the athlete's run in point. They can't go behind or touch the international zone.