A large retail company called HyperSaving wants to develop a new online shopping platform that integrates all
their existing sales channels, including physical stores, online marketplaces, and social media platforms. The company
wants to ensure that the new platform provides a seamless shopping experience for customers, with easy navigation and
personalised recommendations. To achieve this, the company needs to develop a logical data model that integrates data
from all sales channels, and ensures data accuracy and consistency across the platform.

4.1. Based on the above scenario, identify the key entities and explain their relationships.