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2. What is critical section problem\& wnat ale ure o- queues are present. Queue 1 takes 3. Consider multilevel queue scheduling where four queves are present. Queue 1 takes Queue 3 takes processes with priority values 1320 and Queue 4 takes rest of the processes. Queue 1 uses round robin scheduling wit time quantum 4 and Queue 2 uses round robin scheduling wit time quantum 5. Queue 3 and 4 use FCFS. Draw the Gantt chart and calculate average waiting time for the processes shown in the following table. 10 5. Draw the Gantt chart and calculate average waiting time using shortest remaining time first scheduling. Use the same table. 7 Use this table for both Q4 and Q5