the link of ERD here : (Editing is allowable) https://lucid.app/lucidchart/6640c799-1fe0-4bb5-8915-107c5220b536/edit?viewport_loc=-777%2C-1147%2C5450%2C3085%2C0_0&invitationId=inv_f81c5418-3242-4197-9893-ccad83b6fc3c