Three Coaches, Three Athletes and a River Puzzle

The Puzzle:

Three Coaches, Three Athletes and a River

There are three Athletes (Alex, Brook and Chris) and their individual Coaches (Murphy, Newlyn and Oakley) standing on the shore.

No Coach trusts their Athlete to be near any other Coach unless they are also with them.

There is a boat that can hold a maximum of two persons.

How can the six people get across the river?

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