A health care organization (HCO) wants to keep track of its doctors and outpatient locations. For the next three-parts question, draw an ER diagram which represents or describes the requirement. Using ERDplus is not required.

A) For each doctor HCO tracks the DoctorID (unique), DoctorName, and DoctorYearOfMDGraduation (year of graduating from medical school). Draw an entity with attributes for this requirement.

B) For each outpatient location HCO tracks the OLID (unique) and OLName. Draw an entity with attributes for this requirement.

C) Each doctor works at exactly one outpatient location and each outpatient location can have between none (rehab and minor health issues only) and many doctors working at it. Combine the answers from A) & B) to show a complete ER diagram which depicts the relationship between entities with cardinality constraints.