Write down three complete business rules describing relationships from the below
entity relationship diagram. Each rule should fully describe the multiplicities of the
relationship.
1. Each customer can place multiple orders, but each order must be placed by exactly one customer. (1-M relationship between Customer and Order)
2. Each order can contain multiple products, and each product can be included in multiple orders. (M-M relationship between Order and Product)
3. Each product category can have multiple products, but each product belongs to exactly one product category. (1-M relationship between Product Category and Product)