4. Mr.Olin (the foreman) at the optical factory pretends that he wants to be friends with Richard. He tells him that he must be careful of Harrison. What is Mr.Olin's motive here? What is he trying to do that will cause a problem for Richard?

Mr. Olin is actually attempting to provoke a fight between Richard and Harrison for everyone's entertainment. When he realizes a fight cannot be provoked (Richard and Harrison caught on), the workers offer to pay them to participate in a boxing match.