3.1. Are there any problems that may occur on TCustomer1 and Tcustomer2 and explain your answer? (1 mark)

3.2. Are there any problems that may occur on TCustomer3 and explain your answer? (1 mark)

3.3. Are there any problems that may occur on TCustomer4 and explain your answer (1 mark)

Suppose that a Hotel has a room booking system that allows a number of customers to do the following concurrently: (3 marks): Make a new booking; Modify a current booking; Cancel a booking. Assume at the beginning, before any transactions, rooml is free and Customer3 has booked room2. Consider the following four transactions, TCustomerl, TCustomer2, TCustomer3, TCustomer4, which are concurrently running without any form of concurrency control. Each transaction is processed from left to right. TCustomer1: Read(room1); Write1(room1); Commit TCustomer2: Read(room1); Write(room1); Commit TCustomer3: Read(room2); Write(room2); Abort TCustomer4: Read(room2); Read(room2); Write(room2); Commit