$($Geometry: n$-$sided regular polygon$)$ In an n$-$sided regular polygon all

sides have the same length and all angles have the same degree $($i$.$e$.,$ the

polygon is both equilateral and equiangular$).$ In this lab, you will design

a class named RegularPolygon that contains the following fields:

$$ A private int data field named n that defines the number of sides in

the polygon with default value $3.$

$$ A private double data field named side that stores the length of the

side with default value $1.$

$$ A private double data field named x that defines the x$-$coordinate

of the center of the polygon with default value $0.$

$$ A private double data field named y that defines the y$-$coordinate

of the center of the polygon with default value $0.$