Perform the Shortest Job First (SJF) dispatch algorithm on the job queue below: Job 1 arrives at time 0 and needs 500 milliseconds to complete. Job 2 arrives at time 300 milliseconds and needs 400 milliseconds to complete. Job 3 arrives at time 400 milliseconds and needs 200 milliseconds to complete. Job 4 arrives at time 400 milliseconds and needs 500 milliseconds to complete. i. What is the average wait time? (Hint: average the number milliseconds each job was in a wait state) ii. What is the average turn-around-time? (Hint: for each job, count the number of milliseconds from arrival to completion and average)

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