Please and im on short time

Python Language and Please screenshoot code and copy the actually code and paste please

Write a function named problem1 to keep asking the user for names in the form of strings, sort them alphabetically and store these names into a text file named names.txt. Call the function. You may test it with the test case: if the input sequence is "Bob", "Cathy". "Alex", "Catherine", your function should write "Alex", "Bob", "Catherine", "Cathy" in this order to the names.txt. (20 pts)