There are four options for mapping specialization/generalization from an EER to a relational schema. 8A (Relation for both superclass and subclass) 8B (Relation only for subclass) 8C (1 relation with 1 type variable) 8D (1 relation with multiple type variable) For the following EER model, apply all four to map to a relational model. If an option is not applicable, then explain why. name NID address Users shop_name Buyer seller billing_address payment