Show the output of the following programs. (Hint: Draw a table and list the variables in t...

Show the output of the following programs. (Hint: Draw a table and list the variables in the columns to trace these programs.)

(a)
public class Test {
    public static void main(String[] args) {
        for (int i = 1; i<5; i++) {
           int j = 0;
           while (j
               System.out.print(j + " ");
               j++;
           }
        }
    }
}

(b)
public class Test {
    public static void main(String[] args) {
        int i = 0;
        while (i<5) {
           for (int j = i; j > 1; j--)
               System.out.print(j + " ");
           System.out.println("****");
           i++;
        }
    }
}

(c)
public class Test {
    public static void main(String[] args) {
        int i = 5;
        while (i >= 1) {
           int num = 1;
           for (int j = 1; j <= i; j++) {
               System.out.print(num + "xxx");
               num *= 2;
           }
           System.out.println();
           i--;
        }
    }
}

(d)
public class Test {
    public static void main(String[] args) {
        int i = 1;
        do {
           int num = 1;
           for (int j = 1; j <= i; j++) {
               System.out.print(num + "G");
               num += 2;
           }
           System.out.println();
           i++;
        } while (i <= 5);
    }
}