A grocery shop is using the following tables in its relational database:

TABLE Product
  id INTEGER
  name VARCHAR
  categoryId INTEGER REFERENCES ProductCategory(id)

TABLE ProductCategory 
  id INTEGER
  name VARCHAR

TABLE ProductSale
  id INTEGER
  productId INTEGER REFERENCES Product(id)
  price DECIMAL
  date DATE

The company has decided to implement a data warehouse since their analytic queries to get sales information have started causing issues by consuming most database resources.

As a first step, the company wants to create a star schema of the previous tables. Which tables should be present in the star schema?