Please help with add the the code for the tasks below in the Java code below,

so the below code perfoms the tasks. Thanks!

Task $1$

Compile the program with javac BallWorld.java and test it with java BallWorld. Describe in a few words what is happening.

Task $2$

Change the color of the ball $($to eg white$)$ without changing the constructor Ball$()$ where the default color is set. However, you need to make a call to a method that sets the color of a ball. You must figure out which call and where in the code it should be performed yourself. Describe in a few words what changes you made.

Task $3$

A "bounding box" is a rectangle that indicates the boundaries within which the ball bounces. If you resize the window, you will find that the area within which the ball bounces is unchanged. The wasResized$()$ method is called when the window size changes. Modify wasResized$()$ so that the "bounding box" changes to its correct size. Look elsewhere in the code to get an idea of which method is intended and how it should be used. Describe the changes you made.

Task $4$

In the Ball class there are methods to change the color and "bounding box", but there is no method to set the ball's size $($diameter$).$ Add such a method and then use it to resize the ball. Describe the changes you made.

Task $5$

Put in an extra ball of a different color, size and speed so that there are a total of two bouncing balls. Describe the changes you made.

Task $6$ Pulsars

Let the balls alternately grow and shrink. For this you need to determine the minimum size as well as the maximum size of balls $($these limits are chosen wisely$).$ You also need to add an instance variable to the Ball class that indicates whether the ball is currently shrinking or growing. This variable must be of type boolean. Furthermore, you need code that changes the value of the variable when the ball reaches its minimum size and maximum size.

Modify the action$()$ method to give the ball the pulsating property. Describe the changes you made. import java.awt.$*$;

import java.awt.event.$*$;

import javax.swing.$*$;

class Ball $\{$

static int defaultDiameter $=10$;

static Color defaultColor $=$ Color.white;

static Rectangle defaultBox $=$ new Rectangle$(0,0,100,100)$;

private int x$,$ y;

private int dx$,$ dy;

private int diameter;

private Color color;

private Rectangle box;

public Ball$($ int x$0,$ int y$0,$ int dx$0,$ int dy$0)\{$

x $=$ x$0$;

y $=$ y$0$;

dx $=$ dx$0$;

dy $=$ dy$0$;

color $=$ defaultColor;

diameter $=$ defaultDiameter;

$\}$

public void setColor$($ Color c $)\{$

color $=$ c;

$\}$

public void setBoundingBox$($ Rectangle r $)\{$

box $=$ r;

$\}$

public void paint$($ Graphics g $)\{$

g$.$setColor$($ color $)$;

g$.$fillOval$($ x$,$ y$,$ diameter, diameter $)$;

$\}$

void constrain$()\{$

int x$0=$ box.x;

int y$0=$ box.y;

int x$1=$ x$0+$ box.width $-$ diameter;

int y$1=$ y$0+$ box.height $-$ diameter;

if $($x $<$ x$0)\{$

dx $=$ Math.abs$($dx$)$;

$\}$

if $($x $>$ x$1)\{$

dx $=-$Math.abs$($dx$)$;

$\}$

if $($y $<$ y$0)\{$

dy $=$ Math.abs$($dy$)$;

$\}$

if $($y $>$ y$1)\{$

dy $=-$Math.abs$($dy$)$;

$\}$

$\}$

public void action$()\{$

x $=$ x $+$ dx;

y $=$ y $+$ dy;

constrain$()$;

$\}$

$\}$

class BallPanel extends JPanel implements ActionListener $\{$

private int width, height;

private Ball ball;

private Timer timer $=$ new Timer$(50,$ this$)$;

public BallPanel $($int width, int height$)\{$

this.width $=$ width;

this.height $=$ height;

ball $=$ new Ball$($ width $/10,$ height $/5,5,5)$;

ball.setBoundingBox$($ new Rectangle$(0,0,$ width, height $))$;

timer.start$()$;

$\}$

public void paintComponent$($ Graphics g $)\{$

g$.$setColor$($ Color.black $)$;

g$.$fillRect$(0,0,$ width, height $)$;

ball.paint$($ g $)$;

$\}$

public void actionPerformed$($ActionEvent e$)\{$

if$($width $!=$ getWidth$()||$ height $!=$ getHeight$())$

wasResized$($getWidth$(),$getHeight$())$;

ball.action$()$;

repaint$()$;

$\}$

public void wasResized$($ int newWidth, int newHeight $)\{$

width $=$ newWidth;

height $=$ newHeight;

$\}$

$\}$

class BallWorld extends JFrame $\{$

private BallPanel panel $=$ new BallPanel $(180,180)$;

public BallWorld $()\{$

Container c $=$ getContentPane$()$;

c$.$add$($panel$,$ BorderLayout.CENTER$)$;

setSize$(200,200)$;

setLocation$(100,100)$;

setVisible$($true$)$;

setDefaultCloseOperation$($EXIT$\_$ON$\_$CLOSE$)$;

$\}$

public static void main$($String args$[])\{$

BallWorld world $=$ new BallWorld$()$;

$\}$

$\}$