1. In how many wats can 8 people be seated in a row if a. there are no restrictions on the seating arrangement? b. persons A and B must sit next to each other? c. there are 4 men and 4 women and no 2 men or 2 women can sit next to each other? d. there are 5 men and they must sit next to each other or 2 women can sit next to each other? e. there are four married couples and each couple must sit together