* Part 1 Code - matrixmul
*/
public class matrixmul {

private double[][] A;
private double[][] B;
private double[][] C;
private int n;
private ArrayList<MatrixMultiplyThread> threads;

// Constructor
public matrixmul(double[][] A, double[][] B) {
this.A = A;
this.B = B;
this.n = 1;
}

// Method to get Matrix1
public double[][] getMatrix1() {
return A;
}

// Method to get Matrix2
public double[][] getMatrix2() {
return B;
}

// Method to set number of processes
public void setProcesses(int n) {
this.n = n;
int rows = A.length;
int cols = B[0].length;
this.C = new double[rows][cols];
this.threads = new ArrayList<MatrixMultiplyThread>();
for (int i = 0; i < n; i++) {
   threads.add(new MatrixMultiplyThread(this));
}
int count = 0;
for (int i = 0; i < rows; i++) {
   for (int j = 0; j < cols; j++) {
   threads.get(count % n).addCoordinate(new Coordinate(i, j));
   count++;
   }
}
}

// Method to print threads
public void printThreads() {
if (threads != null) {
   for (MatrixMultiplyThread thread: threads) {
   System.out.println(thread);
   }
}
}

// Method to perform multiplication
public double[][] multiply() throws InterruptedException {
for (MatrixMultiplyThread thread: threads)
   thread.start();
for (MatrixMultiplyThread thread: threads)
   thread.join();
return C;
}

// Method to add to result matrix
public synchronized void add(int i, int j, double value) {
C[i][j] += value;
}

// Method to get duration
public long getDuration() {
long duration = 0l;
for (MatrixMultiplyThread thread: threads) {
   duration += thread.getDuration();
}
return duration / threads.size();
}

// Method to parse matrices from file
public static matrixmul parse(String filename) throws IOException {
Scanner s = new Scanner(new File(filename));
ArrayList<ArrayList<Double>> matrix1 = new ArrayList<ArrayList<Double>>();
while (s.hasNextLine()) {
   String line = s.nextLine();
   line = line.replace(" ",""

Question 1: Write a program to read from a file “input4_01.txt” a...