2. (40 points) Your boss at a vending machine company wants you to help design the user interface for a state-of-the-art bottled drink dispenser. Because you're the newbie in the department, you get to design the Domain Model. This is just the first pass, so realize that your model will be refined later. If you need more space, you may use the back of the page. a) Identify all the Actors, Agents, and Servers that you can think of. b) Identify the high-level use cases & scenarios