There are four people in an adventure race that
need to get across a lake. They have a small
canoe. The rules say that only the slowest person
in the canoe can paddle, only one or two can be
in the canoe at a time, and they must all cross
in the canoe. From practice, they know that:
Ann can paddle across in 1 minute.
Bill can paddle across in 2 minutes.
Sue can paddle across in 5 minutes.
Mike can paddle across in 10 minutes.
How do they get everyone across the river
in the fastest time without breaking