import java.awt.*;
import javax.swing.*;
public class gradesArray extends JApplet{
int grades[][]={{77,68,86,}, {96,87,89},{70,90,86}};
int students,exams;
String output;
JTextArea outputArea;
public void init(){
students=grades.length;
exams=grades[0].length;
outputArea=new JTextArea()...