The Training Database $(14$ points$)$ You are asked to design a database for your company's training program. There are in total $8$ instructors and $5$ different courses. Because of classroom capacity and different schedule needs, each course may have several class sections. Each instructor is responsible for up to five classes, and each class is taught by only one instructor. A class can handle up to $25$ trainees per class. A

trainee may register up to $5$ classes at the same time. A class will be canceled if it has fewer than $5$ trainees.

An ID is needed for each entity. Other data needed in the database includes $($separate the attributes into smaller attributes when appropriate$)$: instructor name, instructor email, course name, course description, class name, class schedule, class capacity, trainee name, and trainee e$-$mail. Also, a grade for each trainee on each class should be recorded in the database.