11 To publicise a venue, a hotel manager gave a gift to each of 12 prominent businesspeople as they went into the conference room and seated themselves at a round table to begin discussions. The gifts comprised 4 fountain pens, 5 pocket electronic organisers and 3 calculators. Calculate what fraction of the possible unrestricted arrangements is the number of arrangements that has 4 businesspeople who have been given a fountain pen sitting next to each other