Rectangle and Triangle classes should inherit from Shape, which only has the area$()$ method that is defined as virtual to implement polymorphism. $$ Rectangle class has two Point type members, corresponding to the upper left and lower right points of the rectangle constructed, that is$,$ these points are expected to be supplied to the constructor of the class. $$ Upon construction, you are advised to compute width and height of the rectangle using the getDistance$($Point$,$Point$)$ static method of the Point class. $$ Triangle class has three Point members, given during the construction of the object. Similar to Rectangle, you should calculate the length of the edges of the triangle during construction. $$ Point class is used by Rectangle and Triangle classes. Point represents a point in the Cartesian coordinate system using x and y integer distances from the origin. The class has two accessor methods, getX$()$ and getY$(),$ in order to allow read access to private x and y fields. Point also defines a static method getDistance$($Point$,$Point$),$ to calculate the distance between two given point