4B. A SMP system contains three processors with L2 caches connected using a time shared bus is shown in the figure 4B. Explain how the following cases are handled in the initiating processor and the snooping processors that uses MESI protocol for the scenario given below. Draw the state transition diagram for both cases i)Processor A wants to modify the value of Z to 100 ii) Processor B wants to modify the value of X to 50 Processor A Processor B Processor C Z-50 2 Caches X-10 X= 10 Main Memory X-10 Z-0 Figure 4B 4M 4C. Define Process and Thread in the context of multithreaded processors. With the help of diagrams explain the different approaches to multithreaded processors that have hardware for issuing multiple instructions per cycle and simultaneous execution of multiple threads in a cycle. 3M