Regarding the Crow$$s foot notation, an entity is represented by a $.$

$2.$ The name of entity should Avoid using spaces by using $,$ and to be $,$ singular.

$3.$ The name of attribute should also avoid using space, by using $.$

$4.$ Attributes, Primary Key attribute is and Foreign Key presented $.$

$5.$ Relationships have $.$ These are shown on both sides of the line.

a$.$ The first one $($often called multiplicity$)$ refers to of times that an instance of one entity can be associated with instances in the related entity. It can be or $.$

b$.$ The second describes of times one instance can be related to others. It can be or one, and accordingly describes the relationship as optional or mandatory.