In c++

Define the class Point3D that represents an ordered triplet (x, y, z) in a 3 dimensional coordinate system.

a. Class Point3D inherits from class Point2D and has an additional private data member z(double).

b. Define a default constructor as well as a constructor with parameter for the Point3D class.

c. Include a get/set functions for the private data member z.

d. Redefine the function distance() in Point3D that uses the formula sqrt (x^2 + y^2 + z^2) to compute the distance of the point from the origin.

e. Test the class Point3D by writing a main function in which you create a Point2D object as well as a Point3D object using the constructor with parameters. Next display their distances from the origin.

f. Demonstrate polymorphic behavior by declaring a Point2D pointer type variable and separately assigning a Point2D object and then a Point3D object to the pointer and calling the distance function using the pointer. Which distance function will be called? What does your code show?