SECTION II. Relationship modeling Problem (3} Draw an entity relationship diagram [ERD]: for the following situations. Wouid the reiationships be identifying or nonidentifying? Why? a An employee has on phone extension, and a unique phone extension is assigned to an employee. a A patient must be assigned to only one doctor, and a doctor may have many patients. Example: A movie theater shows many different movies, and the same movie may be shown at different movie theaters. ISM 3113 Systems Analysis 8: Design Inoclass Assignment: ERDs Solution