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11. A(n) is a person, place, object, event, or concept in the user environment about which the organization wishes to maintain data. 12. We often refer to data that describes the properties or characteristics of end-user data and th e context of data as 13. programs that use the data. 14. With the one subtype. 15. We usea given instance of a supertype. For the following questions (16 -19), please draw your answers on the space below the question or on the back of the page. I would suggest pencils for this. refers to the separation of data descriptions from the application rule, a given instance of a supertype must be a member of at most to determine the target subtype (or subtypes) for a 16. When you register for a course, you may notice that it requires you to have completed certain prerequisite courses. A course can have several prerequisites. In addition, any one course may be used as a prerequisite to many other courses. Some courses have no prerequisites (for example introductory courses) and other courses cannot be used as prerequisites. A course prerequisite may be flexible or firm. For example, the prerequisite to INFO 610 is INFO 364, in certain instances this prerequisite can be waived, making it a flexible prerequisite. Courses have CRN numbers which uniquely identify them. In addition, courses are described by their name, course description and major area. Please draw a fully specified ERD to model the situation above. Any M:N relationships must be decomposed into associative entities. All FK and PK attributes must be identified