Indicate how a focus group moderator should handle each of the following cases: (a) A participant is loud and dominates the conversation; (b) a participant is obviously suffering from a cold and goes into coughing fits every few minutes; (c) two participants who, it turns out, are acquaintances, persist in a private conversation about their children; and (d) the only minority representative participant in the focus group looks very uncomfortable with the group and fails to make any comments.