In an ERD, How is a Weak Entity Set represented?UnderlineDouble lineDouble diamondDouble rectangleRectangle

What is used to indicate a weak entity in an ERD?Double rectangular boxSingle rectangular boxDouble diamondSingle diamond

A weak entity set in an E-R diagram is an entity set that:

What is the purpose of a weak entity in an ER diagram?a.To represent an entity with a unique keyb.To represent an entity that depends on another entity for identificationc.To represent an entity that does not have attributesd.To represent an entity with a strong identity

E-R model uses which symbol to represent a weak entity set :

For a weak entity set to be meaningful, it must be associated with another entity set, called the