What functions are needed in this case?

Question

OOP

Good afternoon everyone.
I am going through training and asked this question:
There are Models:
Client
Store
Product
The client is many-to-many with the store, one-to-many with the product.
We need save, delete(recursion), get functions for these models and links.
Describe, approximately, what classes (and methods, if there is enough time) in PHP you will create for implementation.
(possible in pseudo-language, syntax is not the main thing)
Can you tell me? Something I'm at an impasse.