What scheduling criteria from the following measures how long it takes for a process to run to completion? Waiting time Throughout Response time CPU utilization Turnaround time What CPU scheduling algorithm from those listed below yields the optimal waiting time? Shortest Job First First-Come, First-Served Multilevel Queue Scheduling Priority Scheduling Round Robin On a single-CPU system in steady state, with 1 process an average on the ready queue, the average arrival rate for new processes in the queue is 4/second. What is then the average waiting time? Write just the number: e.g. if the answer is 0.9 seconds, write just 0.9