Each blank should contain only one whole number. In some cases, 0 (zero) may be a valid answer. Click to see additional instructions 1. The ERD shown above contains entities including relationship entities. 2. The RESTAURANT entity has attributes including the primary key(s). 3. The RESTAURANT entity has primary key(s). 4. The RESTAURANT entity has optional attribute(s). 5. The RESTAURANT entity has required attribute(s) including any required primary key(s). 6. The RESTAURANT entity has foreign key(s)