8. New Heights is a training institute that provides courses on various nontechnical subjects, such as personality improvement and foreign languages. Xuan, the Database Designer, has made the following relations to represent the data about students, batches, and modules covered in the batches: STUD-ID: Student's id (unique) NAME: Name of student BATCH-NO: Batch number (one student can belong to only one batch) SLOT: Time and day when the batch of students attends the class MODULE: Module or subject (one batch will do several modules) MARKS: Marks obtained in a module test Xuan now needs to simplify the above relations by normalizing them