A company sells packages of decorative papers, each containing three sheets of paper. The available colors are: red, orange, green, blue, and purple. Each package must conform to the following rules: Each package must contain sheets of either two or three different colors. A package containing any orange sheet must also contain at least one red sheet. A package containing any red sheet must also contain at least one orange sheet. Blue and purple sheets cannot be packed in the same package. A package containing any green sheet must also contain at least one purple sheet, but a package containing purple sheet need not contain green sheet. An acceptable package CANNOT contain two sheets of-