$2.$ Sketch the ERD for the following scenario: JMU has many buildings on campus. Each building has a unique Building Id$.$ Buildings also have a Building Name and Address. Buildings are classified to determine their use. Some buildings are classified as Classroom buildings. These buildings have characteristics of Number of Classrooms, and Total seating capacity. Other buildings may be classified as Office buildings. These buildings have characteristics of Communication line type, Style, and Staffing Type. A third classification of buildings is Utility. Utility buildings have a Usage type $($storage$,$ garage, etc$)$ and a building Manager.