Question 5 (6 marks) Lilan's working papers for evaluating a client's internal controls include the following notes: There were over 1,000 purchase transactions under $4,500 from four vendors; these are routine purchases. . All purchases over $4,500 are non-routine transactions and must be pre- approved by the purchasing manager, but one purchase for $15,000 was authorized by the plant manager without the purchasing manager's initials. . All cheque stubs for purchases should have purchase order numbers recorded, but 5% of the sample did not have the purchase order number recorded - traced the 5% to August payments. Required For each of the notes above answer the following questions: a. Does it represent a possible control problem? b. If yes, why does it represent a possible control problem? c. If no, why is it not a potential control problem? (CGA Adapted)