8. The Last Supper On the last night of Scout camp, Chris, his wife Jo and the 11 other adults sit down for
supper along one side of a long rectangular table.
Chris takes the central seat, with six adults on each side of him.
Jo must sit next to Chris.
Alex, Barb and Dave insist on being next to one another (in any order) on the side to
Chris's left.
Eddie, Fred and Gareth are fed up with Alex's snoring, so they refuse to be on the same
side of Chris as him.
Heather, Iris, Kane, Luke and Michael have no seating preferences.
How many arrangements of the adults are possible?