1) Make a list of the last four digits of the phone numbers in your cell phone contact list (use at least 50 numbers).

2) create a random distribution of thesumof the last 4 digits from the phone numbers in your cell phone contact list

3) create a cumulative distribution function.

4) Using that distribution function, tell me the number associated with my random draws of 50%, 42% and 88%

Just need some guidance on 2-4. Thanks!