Laura has more muscular strength. Susan has more muscular endurance.
A RN Nurse would be better and quicker and a good start. Many schools are forwarding that position and beginning to make classes about it, as the nurse job is the future.
That's my opinion, take it from a Fire Fighter and soon to be EMT.
A sheriff. A sheriff is elected into office by the people of a certain district.
Hope this helps! (: