What is the difference between a mediator and an arbitrator?

a$.$

A mediator is a neutral third party, while an arbitrator represents one of the parties.

b$.$

A mediator is used for complex cases, while an arbitrator is used for simple cases.

c$.$

A mediator has decision$-$making power, while an arbitrator does not.

d$.$

A mediator is hired by one party, while an arbitrator is hired by both parties.

e$.$

An arbitrator has decision$-$making power, while a mediator does not.