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Consider a multi-level queue in a single-CPU system. The first level is given a quantum of 6ms, the second one, a quantum of 12ms, the third is scheduled FCFS. Assume 6 processes arrive all at time zero with the following burst times (in ms) in order: 4, 7, 12, 20, 25 and 30. 1. Draw the Gantt chart for each queue level 2. Compute the average waiting time 3. Compute the average turnaround time Important Hint All processes will be given a quantum of 6ms (first level), in case a process needs more burst time then it will be given a chance in second level (its quantum 12ms ) if not yet terminated it enqueues in the third level