HELP WITH THIS PYTHON PROGRAM PLEASE!

Suppose you have successfully created the Pet class. Now, create a subclass Dog that inherits the superclass PET. The subclass Dog has one more unique data attribute _sound. The subclass Dog also has the make sound method, but it is different to the Pet class's make, sound method, since it prints the data attribute sound. Then, write a main program that creates a Dog instance (with name "Duke" and sound "Woof"), and call the appropriate method to have him making the sound