The Res resource class is used to create resource objects with resource items that processes can acquire in a mutually exclusive manner. Using this class, there is an implicit exclusive access to the resource items. In the simulation model that implements the solution to deadlock by disallowing the hold and wait condition, why is a critical section needed? Discuss all possibilities. Modify the model in file philoshw.jar to make a relevant change in the program and carry out a test simulation. Compare the performance measures.