24 Apr IS 441 Data Modeling HomeworkThree problems, 20 points Use Micro
IS 441 Data Modeling HomeworkThree problems, 20 points Use Microsoft Visio or Drawing tools in Word/PPT to develop the ERDs for all ERD HWs. Problem 1 (5 pts).(1) Follow the format of the entity definitions on P.59 of the text, define the entity [define ENTITY! Not define attributes] given below;(2) in the entity defined in step (1), identify one distinguishing/defining attributes of the entity.Entity to be defined: a real estate agent serving a certain geographical region (i.e., not necessarily those within the same company, but those serving the same geo region). Problem 2 (9 points). Business rules, and ER diagram with cardinality. (TWO E-R diagrams for this problem) (1) Create business rule(s) for the given business scenario. Please follow the format of definitions and the statements of business rules on PP. 58-59. You are FREE to make YOUR OWN assumptions – clearly state your assumptions. Remember: for each relationship, you need to state from both directions.(2) Based on the rules, create the ER diagram (ONE diagram reflecting all rules).(3) Then make a/some change(s) in the assumptions that will lead to change(s) in cardinality (or even the relationship), and create the revised ER diagram. You are assigned ONE problem (by last name) from the following (all have associative entity): Business ScenarioLast Name1. DRIVER receives CITATION, POLICE issues CITATIONA-G2. TUTOR has APPOINMENT, STUDENT comes to APPOINTMENTH-R3. CUSTOMER books RENTAL-CONTRACT, CAR is rented in RENTAL-CONTRACTS-Z4. STUD-ORG makes BOOKING (of ROOM), ROOM is booked in BOOKING.No-credit exercises5. （Library）PATRON has CHECK-OUT, BOOK appears in CHECK-OUT1) All entities are in CAPS; 2) No attribute except keys (PK, FK); 3) All relationships are already given; please do NOT “introduce” your own relationship; in other words, ONLY depict what is explicitly given. Problem 3 (6 points). Chapter 2, end of chapter “Problems and Exercises”: P. 105, 2-39e[Note: THREE variations of ERDs]
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