If participants do not have the hands to comment. The seminar participants will be invited to speak at the same time by one to two to three minutes on each issue.
But if participants do not have to lift a hand to comment. Seminar leaders will invite the participants to speak one at a time, 2-3 minutes on each issue.
But if you do not have a seminar participants to raise their hands and opinion leaders seminar participants will be invited to attend seminars, one to the other, and each time 2 - 3 minutes for each issue