please assist

1. Based on the Crow's Foot EHD below: a] list the entities for each entity, list the attributes, the relationship oardinalities between the entities and the primary and foreign keys. For example, there is a one to many [1:M) relationship between the CUSTOMER and INVOICE entities. [What does the circle notation in 2 reii us?) 2. Assist me with understanding the business rules that are reflected in the following Crow's Foot ERD. N.B.: You need to list 3 business mles. one mle for each cardinality symbol. l have labelled the symbols from 1 to B in red. Label your bu$iness rules accordingly. The business rules should be stated in plain English. For example, here is the business rule (again, in plain English) corresponding to the symbol labelled 2: 2. Every customer can have many invoices