Create ER diagrams for the following three scenarios.

Create ER diagrams for the following three scenarios. Make sure that you read the description carefully. Your diagram should reflect all entities, relationships, and attributes mentioned in the text. You may make assumptions, please specify in your answer. You may need to add a primary key if one hasn’t already been specified in the instructions. Use the relationship types we used in class (one-to-one, one-to-many, or many-to-many). Don’t forget that attributes can be attached to both entities and relationships.

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A nonprofit organization depends on a number of different types of people for its successful operation. The organization must capture, for each person, social security number, name, address, city/state/zip, phone number and email address. People can be classified into employees, volunteers, and donors. For the employees, it will be important to capture their date hired and current position. Since volunteers participate in various events, it’s important to know what skills they have in order to match them better to the appropriate events. For each event, we need to know its name, date, and location. Donors donate items (including money) to the nonprofit organization. For each item, we need to know what it is and its value. It is possible for a person to belong to more than one of these groups (for example, a volunteer and a donor). Draw the ER diagram to represent the entities, attributes, and relationships described. Be sure to list all assumptions necessary.

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Draw an ERD for the following situation. (State any assumptions you believe you have to make in order to develop a complete diagram.) The H.I. Topi School of Business operates international business programs in 10 locations throughout Europe. The school had its first class of 9,000 graduates in 1965. The school keeps track of each graduate’s student number, name when a student, country of birth, current country of citizenship, current name, current address, and the name of each major the student completed. (Each student has one or two majors.) To maintain strong ties to its alumni, the school holds various events around the world. Events have a title, date, location, and type (e.g., reception, dinner, or seminar). The school needs to keep track of which graduates have attended which events. For an attendance by a graduate at an event, a comment is recorded about information school officials learned from that graduate at that event. The school also keeps in contact with graduates by mail, e-mail, telephone, and fax interactions. As with events, the school records information learned from the graduate from each of these contacts. When a school official knows that he or she will be meeting or talking to a graduate, a report is produced showing the latest information about that graduate and the information learned during the past two years from that graduate from all contacts and events the graduate attended.

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