1. Consider a database with the following schema:

Person (name, age, gender) name is a key Frequents (name, iceCreamShop) (name, ice cream shop) is a key Eats (name, flavor) (name, flavor) is a key Sells (iceCreamShop, flavor, price) (iceCreamShop, flavor) is a key

a) For each person, find all ice cream flavors the person eats that are not served by any ice cream shop the person frequents. Return the name of the person and the ice cream flavor in pairs.