In her projects, Jess works with various geometrical objects. To simplify the process, she needs to create different classes for the shapes.
One of these shapes is a sphere. There are 3 characteristics she needs for the sphere: the PI number, the radius r and the volume v of the particular sphere.
The volume is calculated according to this formula: .
Finish writing the code below: determine which attributes are class or instance attributes, and do necessary calculations. Make sure to name the attributes like they are presented above (that is, PI, radius, and volume.) Use (for checkup purposes).
You do NOT need to create any instances of the class or work with input.
The constant can be stored as a class variable, the radius can be passed as a parameter to the __init__ method, and volume can be calculated within the __init__.
