Using the four Fine$-$Granular Design$-$Specific ER Diagrams given below, show how$/$where the relevant deletion rule can be incorporated into the ER diagram for the following four deletion constraints. Consider each deletion constraint independently and be sure to indicate if the deletion rule can be appropriately applied for the deletion constraint.

If a physician is deleted from the database, all prescriptions written by that physician must be deleted.

If a patient is deleted from the database, all prescriptions received by that patient must be deleted.

$2$