UP Geographic Information System Discussion Questions

I’m studying for my Science class and need an explanation. 1) What is the difference between GIS and CAD? Why GIS and CAD both exist?2) Imagine you are looking at a geodatabase that contains 50 states, 500 cities, and 100 rivers. How many feature classes are there? How many features? How many attribute tables? How many total records in all the attribute tables? ReferencesKang-Tsung Chang (2016) Introduction to Geographic Information Systems, 9th edition, NY: McGraw-Hill ISBN19: 978-1-259-92964-9Additional Reading Materials:Wilpen Gorr, Kristen Kurland (2017) GIS Tutorial 1 for ArcGIS PRO, ESRI Press,Michael Law, Amy Collins (2018) Getting to Know ArcGIS Desktop, 5th edition for ArcGIS 10.6, ESRI Press