create E-R or EER model for the following problem. In the hospital, there are several IR rooms for IR operations. Each room has an ID (e.g., IR1, IR2, Cath1, Cath2, etc.). There are general description of each room about its equipment and capability (e.g., what types of exams to be scheduled). Each room can be scheduled with multiple exams. And each IR exam will be scheduled and conducted in only one IR room