Anke works for a company that uses teams to accomplish projects whenever they can. She was recently placed on a team to develop a new international marketing campaign. During the first team meeting, Anke found that there were several employees from unrelated departments. While each had unique skills and talents, none of them knew very much about the process for developing an international marketing campaign.

What would be the ideal size for the group Anke is working in$?$

Ten members

Fifteen members

Five members