java Write a Java program which illustrates how to:

$$ Create a class Circle, which has:

$1.$ One attribute $($radius$).$

$2.$ Default constructor.

$3.$ Overloaded constructor

$4.$ Function to set the radius.

$5.$ Three accessor functions to get the $($radius$,$ area of circle, volume of

sphere$).$

$6.$ Function to display $($radius$,$ area, volume$).$

$$ In the main function:

$1.$ Ask the user to enter value for the radius.

$2.$ Make a call to display the attributes.

Given information:

PI $=3\mathrm{.}14159$

Area $=$ PI $*$ Radius$2$;

Volume $=4\mathrm{.}0/3*$ PI $*$ Radius$3$

Task# $3$

Create a class called Car that includes three instance variables:

$$ A model $($type String$)$

$$ A year $($type String$)$

$$ A price $($double$).$

Provide a constructor that initializes the three instance variables.

Provide a set and a get method for each instance variable. If the price is not positive, do

not set its value.

Write a test application named CarApplication that demonstrates class Car$$s

capabilities. Create two Car objects and display each object$$s price. Then apply a $5\%$

discount on the price of the first car and a $7\%$ discount on the price of the second.

Display each Car$$s price again.