Consider the following 3NF relations about a sorority or fraternity: 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(Commituee_ID,Officer_in_Charge) WORKERS(Committee_ID,Member ID) a. ns S. b. Draw an E-R diagram for these relations, using your an swer to Problem and Exercise 9-47a. c. Explain the assumptions you made about cardinali- ties in your answer to Problem and Exercise 9-47b. Explain why it is said that the E-R data model is more expressive or more semantically rich than the rela- tional data model