1. What is the difference between qualitative and quantitative data? 2. Provide one example for a numerical discrete, numerical continuous, categorical nominal, and categorical ordinal variable. For this part, you should provide a total of four examples. 3. There are many different types of graphical representations (e.g., bar graphs, pie graphs, histograms, dot plots, time series plots, stem-and-leaf-plots, etc.). Provide an example of a real-world application of when a specific type of graphical representation is used to make informed decisions. Add references please