Only question 9e and 9i. C# in visual studio and modeling activity diagrams in ibm rhapsody. Mainly concerned and having issues with the C# coding portion. Please help!

9. Use activity diagrams to model the following procedures and code it in C#: a. Check if two list of names are overlapping b. Find the standard deviation of a list of decimal numbers c. Sort a list of integers from the smallest to the biggest d. Given a list of names, find how many names are over 20 characters e. Given a list of decimal numbers, find out how many of the numbers are zeros f. Given a list of dates, find a sub list of dates that fall in 2018. g. Given two lists of numbers, find a list of numbers that are common in both lists. Encrypt a text message by using an integer key to increment the ASCII code for each character in the message. Given two time periods, determine if they are overlapping or not j. Given two time periods, determine the amount of overlapping time in days between them