CPU scheduling in Unix -- 2

Problem Statement: You will implement a framework for CPU scheduling with three scheduling algorithms: FIFO, round robin, and shortest job first (SJF). Jobs arrive at the CPU scheduler at arbitrary times. When a job arrives, its computation time is known. Assume that all jobs involve only computation, and perform no Input/Output. Jobs thus need to run on the CPU for a total duration equal to their known computation times. When they complete, they leave the system