Create a module and name it Lastname_Firstname_final.py. For example, John Smith's module would be Smith_John_final.py. In the module, add the following functions: 2. Write a function named problem2 that accepts a string. Assume the string contains a lot of numbers that are separated by commas. Remove all the duplicates from the list, then calculate and return the sum of remaining elements. Call the function and display the return result. Test your function with this test case: if input string is 1,2,3,3,4,4,5, then your method should return 15. (10 pts)