D. Read each problem and answer the questions that follow. 1. Allan has 18 blue balls and 27 red balls. He wants to group them of the same size. Each group must have the same number of blue and red balls. What is the greatest number of groups that he can form? a. What is asked in the problem? b. What facts are given? c. How will you solve the problem? d. Show your solution. e. What is the answer to the problem?