2. (20 points) The NDHU campus is large with many buildings, facilities and roads. New students tend to get lost, especially in the first semester. It would be nice to have a customized APP to help the students. Outline the design by answering the following questions. (Don't need to write the complete code. Just the key elements of the C+ t classes. You may use existing C+ classes in the textbook w/o copying in here. Specify your selection clearly.) (a) Choose an appropriate data structure for the problem and briefly explain it. (b) Outline the skeleton of a NDHUCampus class to maintain the information about all relevant entities: buildings, facilitics and roads. (c) Write Add/Delete functions to add/delete entities on the campus. (d) Write a Find function to scarch for a particular entity. (c) Outline how would you test your classes/functions in the main program