import java.io.*;
import java.util.*;

public class Assignment4 {

public static int RR_TIMER = 100;

private static int[] waitingTimes;
private static int[] turnaroundTimes;

private static int count = 0;

// enum to specify simulation type
public enum SimulationType {
FCFS, SJF, Priority, RR
}

// method to get sample process from file
public static ProcessControlBlock getSampleProcess(SampleReader sr) {
   int process = sr.readProcess();
   int arrival = sr.readArrival();
   int priority = sr.readPriority();
   int burst = sr.readBurst();
   ProcessControlBlock sampleProcess = null;
   if (process >= 0 && arrival >= 0 && priority >= 0 && burst >= 0) {
      sampleProcess = new ProcessControlBlock(process, arrival, priority, burst);
      //System.out.println((count++) +") " + process + " " + arrival + " " + priority + " " + burst);
   }
   return sampleProcess;
}

// method to run simulation (supports all four simulation types)
public static void simulate(String file, int time, SimulationType type) {
   SampleReader sr = new SampleReader(file);
   PriorityQueue readyQueue = new PriorityQueue();
   ProcessControlBlock sampleProcess = null;
   ProcessControlBlock runningProcess = null;
   waitingTimes = new int[time];
   turnaroundTimes = new int[time];
   int runningTerminationTime = -1;
   int numP = 0;
   sampleProcess = getSampleProcess(sr);
   for (int current = 0; current < time; current++) {
      waitingTimes[current] = -1;
      turnaroundTimes[current] = -1;
      while (sampleProcess != null && sampleProcess.getArrivalTime() == current) {
         if (type == SimulationType.FCFS) {
               readyQueue.putQueue(sampleProcess, sampleProcess.getArrivalTime());
         } else if (type == SimulationType.SJF) {
               readyQueue.putQueue(sampleProcess, sampleProcess.getCpuBurstTime());
         } else if (type == SimulationType.Priority) {
               readyQueue.putQueue(sampleProcess, sampleProcess.getPriority());
         } else if (type == SimulationType.RR) {
               readyQueue.putQueue(sampleProcess, current);
         }
         sampleProcess = getSampleProcess(sr);
      }
      if (runningProcess != null) {
         if (runningTerminationTime == current) {
               turnaroundTimes[current] = current - runningProcess.getArrivalTime();
               //System.out.println("COMPLETE @ t=" + current + ": " + runningProcess.getProcessNo() + " " + runningProcess.getArrivalTime() + " " + runningProcess.getPriority() + " " + runningProcess.getCpuBurstTime());
               //System.out.println("TURNAROUND @ t=" + current + ": " + turnaroundTimes[current]);
               runningProcess = null;
               runningTerminationTime

Q1) Write one page report on dataset. Explain the following in your...