I meed the solution please

Draw ERD for the university system: The university system stores information about students and courses. The student could be either undergraduate student or postgraduate student. A The undergraduate student information is: name (first name and last name), student ID, which should be unique, and email. B. The postgraduate student information is: name (first name and last name), student ID, which should be unique, email and dissertation title. c The student can be registered to one college. The college information is: college name and ID. The college has several employees who could be either instructors or staff. Both have name and ID. The instructor has position and emails (more than one email), while the staff has job title. D The student can enroll in a number of courses. Each course has the following information: ID, title and credit. The course is taught by one instructor only. Note: don't forget to model if exists the following: Completeness Constraints, Disjointness Constraints, Subtype Discriminators