$3.$ Entity$-$Relationship Diagram $($ERD$)$

The ERD will model the relationships between different entities, such as Students, Courses, Professors, Grades, and Enrollments. Important entities include:

Student:

Attributes: Student ID$,$ Name, Address, Email

Relationship: Registers for courses, receives grades

Professor:

Attributes: Professor ID$,$ Name, Department

Relationship: Teaches courses, submits grades

Course:

Attributes: Course ID$,$ Name, Credits, Max Enrollment

Relationship: Is taught by professors, is registered for by students

Enrollment:

Attributes: Enrollment ID$,$ Course ID$,$ Student ID$,$ Enrollment Date

Relationship: Links students and courses

Draw ERD diagram