Draw class diagram for Online Learning System. Make necessary assumptions.

An Online Learning System is a platform that allows students to access courses, attend classes, interact with instructors, and take assessments online. To model this system using Object-Oriented Analysis and Design (OOAD), we begin by identifying the main classes involved and their relationships. The key entities in such a system typically include Student, Instructor, Course, Lesson, Assessment, Submission, and Admin. These classes are interconnected through various associations, inheritance, and composition relationships.

1. Class Descriptions and Responsibilities:

• User (Abstract Class): Represents a generic user in the system. Both students and instructors inherit from this class. It contains attributes like _______ __________ ____ ______ _______ __________ ___ ___ _____.
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