7. A database at a college is required to support the following requirements. Complete the information-level design for this set of requirements. Use your own experience to determine any constraints you need that are not stated in the problem. Represent the answer in DBDL. a. For a department, store its number and name. b. For an advisor, store his or her number and name and the number of the department to which he or she is assigned. c. For a course, store its code and description (for example, MTH110 or Algebra). d. For a student, store his or her number and name. For each course the student has taken, store the course code, course description, and grade received. In addition, store the number and name of the students advisor. Assume that an advisor may advise any number of students but that each student has just one advisor.

8. List the changes you would need to make in your answer to Question 7 if a student could have more than one advisor.

9. Suppose in addition to the requirements specified in Question 7, you must store the number of the department in which the student is majoring. Indicate the changes this would cause in the design in the following two situations: a. The student must be assigned an advisor who is in the department in which the student is majoring. b. The students advisor does not necessarily have to be in the department in which the student is majoring.

10. Illustrate the physical-level design process by means of the design shown in Question 7. List the tables, identify the keys, and list the special restrictions that programs must enforce.