Consider a system in which there are three processes (A, B and C) running. Page references made by each process are shown below along with the time. Assume that your operating system is using working set model for page replacement. Answer the following questions a. If the working set window for each process contains the last delta = 8 page references, what is the maximum size of working set for each process? Show which pages are in the working set when the size is maximum for each process b. Assume that the operating system has a total of 11 frames in the main memory. Considering that each process uses working set window of last delta = 8 page references, will there be thrashing at any point (from t1 to t18)? If yes, at what exact time (t?) the thrashing will start? Show your work including the size of working set and which pages are there in each process's working set when/if thrashing occurs