The favorite ice cream bar of a family of four is packaged as 6 ice cream bars per box. The mother of the family wants to buy enough boxes of ice cream bars so that she can share the ice cream bars equally with all the members of the family, and there will be no extra ice cream bars left over. (a) What is the least number of boxes of ice cream bars she can purchase to achieve her goal? (b) How many ice cream bars will each family member receive? (c) Please explain how to solve the problem.