public boolean museumTour(int numberPeople, boolean isWeekend)

During the week, a museum tour is allowed if the number of people in a tour is 10 or larger.
However, on the weekend, a tour must have at least 20 participants.

Given:
An integer value representing the # of tour participants, and
A boolean value indicating whether it's the weekend or not.
Return true if the museum tour is allowed, false if it's not.