You and your classmates are making plans to see a concert in another city. There are 15 people going, and you decide to drive several cars to the concert. Each car can hold up to
5 people, including the driver. Here is additional information to help make your plans:

It costs $30 per car to park. Everyone has agreed to split the cost of parking evenly.
It takes about 10 minutes for someone to drive between houses to pick up the next person.

Sonja wants to take 5 cars and put 3 people in each car, but Arya wants to take only 3 cars
and put 5 people in each car.