You are designing the embedded system of the elevator system at the Engineering Science Building. The building has 3 floors, where each floor can have a maximum of 2 buttons: up and down. Inside the elevator, the user has a choice to select the destination floor, open and close door. The light and fan of the elevator should be automated to turn on only when occupied. Answer the followings for this problem: a) A list of Things (components) and a list of use-cases for the system. b) Generate these UML diagrams: Class diagram, Component diagram, Deployment diagram, Case diagram, Interaction diagram, Collaboration diagram, StateChart diagram, and Activity diagram.