The following are the cpu and i/o behavior of three processes, timings in seconds. process p1 has 1 second cpu burst followed by 3s i/o followed by 1s cpu burst process p2 has 2 second cpu burst followed by 2s i/o followed by 2s cpu burst process p2 has 4 second cpu burst followed by 1s i/o followed by 4s cpu burst provide approximate sketches of gantt charts, and average turnaround times for the following scheduling algorithms: