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Consider the following 3NF relations: MEMBER (Member_ID, Name, Address, Dues_Owed) OFFICE (Office_Name, Officer_ID, Term_Start_Date, Budget) EXPENSE (Ledger_Number, Office_Name, Expense_Date, Amt_Owed) PAYMENT (Check_Number, Expense_Ledger_Number, Amt_Paid) RECEIPT
Consider the following 3NF relations: MEMBER (Member_ID, Name, Address, Dues_Owed) OFFICE (Office_Name, Officer_ID, Term_Start_Date, Budget) EXPENSE (Ledger_Number, Office_Name, Expense_Date, Amt_Owed) PAYMENT (Check_Number, Expense_Ledger_Number, Amt_Paid) RECEIPT (Member_ID, Receipt_Date, Dues_Received) COMMITTEE (Committee_ID, Officer_in_Charge) WORKERS (Committee_ID, Member_ID) i) Foreign keys are not indicated in these relations. Decide which attributes are foreign keys and justify your decisions (e.g. OFFICER ID is a foreign key in OFFICE referencing MEMBER ID from the MEMBER relation). (10 marks) ) Draw an E-R diagram for these relations, using your answer to 30). (9 marks) ) Explain the assumptions you made about cardinalities in your answer to 3(1). (6 marks)
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