What properties apply to each attribute?UniqueSingularPluralOptionalRequiredEmailAddressSocialSecurityNumber

Unique: This property applies to attributes that must be distinct for each record. For example, SocialSecurityNumber and EmailAddress should be unique because they are used to identify specific individuals.

Singular: This property applies to attributes that can only have one value for each record. For example, SocialSecurityNumber is singular because each person can only have one.

Plural: This property applies to attributes that can have multiple values for each record. None of the given attributes (EmailAddress, SocialSecurityNumber) are typically plural.

Optional: This property applies to attributes that are not required to have a value. Whether EmailAddress or SocialSecurityNumber are optional depends on the specific requirements of the system.

Required: This property applies to attributes that must have a value. Whether EmailAddress or SocialSecurityNumber are required depends on the specific requirements of the system.