ways be only on k and change it. Good luck! Question 53 Which of the following symbols is used in a Level O data flow diagram but NOT in a context diagram? O external entity data flow O process data store o be finish always be only one choice ack and change it. Good luck! The last two Question 55 Current accounts payable for a company that has implemented the Procure-to-Pay database system can be calculated by summing the BALANCE field in the CASH table summing the AMOUNT field in the PAYMENTS table summing the BALANCE field in the VENDORS table MacBook AS summing the AMOUNT field in the PURCHASE-ORDERS table summing the AMOUNT field in the PURCHASE-RETURNS table always be on ack and change it . Good lu Question 57 According to the conversion rules for EER diagrams, all optional relationships should be treated as O optional many relationships mandatory one or mandatory many relationships, depending on the cardinality of the optional relationship none of the other choices mandatory many relationships mandatory one relationships ack and change Question 58 In most common implementations of the SAP R/3 client-server architecture there are multiple central databases and multiple application servers one central application server and multiple databases one central database and one application server one central database and multiple application servers none of the other choices