1. A long rectangular banquet table has the same number of participants seated on either side and no one sitting at the ends. Banquet participants are all served either a chicken or a fish entree. On one side of the table, 11 people are served chicken and the rest are served fish. On the other side of the table, 5 people are served fish and the rest are served chicken. In all, how many more banquet participants at this table were served chicken than fish?