The questions in this homework are based on the following scenario : The tables and relational model shown below are from a sport club program allowing customers to have periodic personal training with a coach for a specific discipline. Information about coaches include their hired year, specialty discipline and their contract type which can be full or part time. Customers name, age and membership type is recorded in the database. Memberships allow customers to take a variety of classes. Three types of membership are available : 3-Months , 6-Months and Annual. Decide not to have a membership and just pay a class fee for each class session. Those customers are registered as having a Daily membership