1. Consider the entity-relationship diagram shown in Figure 5-28, the refined ERD showing course enrollment with an associative entity. Does this model allow a studentto enroll in more than one course section at a time? Does the model allow a course section to contain more than one student? Does the model allow a student to enrollin several sections of the same course and get a grade for each enrollment? Does the model store information about all grades earned by all students in all sections?
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