8. How many different ice cream sundaes can be made at a restaurant if they have four different flavours of ice cream, four different toppings and five different sauces if a sundae must consist of one each of ice cream, toppings and sauces? 9. How many ways can five married couples sit in a row on a park bench if a) There are no restrictions? b) Every husband and wife must sit together? 10. At an ice cream parlor, there are six different things that can be put on a sundae - nuts, fudge, sprinkles, butterscotch, bananas and strawberries. How many different combinations of toppings can a customer have if they have at least one