1. Six young men and six girls decided to go to the cinema for the premiere movie "It" For this purpose, 12 tickets were purchased (seats are nearby together) In how many ways can they occupy their seats if a) men do not want to sit next to each other: b) All girls want to sit next to each other: c) One girl and one young man refuse to sit next to each other: d) Two young people want to sit on the edges.