1. Write a function to keep asking the user for names in the form of strings, sort alphabetically and store these names into a text file named names.txt

2.

Write a function that accepts a string as the argument, removes all alphabetical letters from the string, and returns it

3. Write a function that accepts a file name in the form of a string as the argument. Assume the text file contains single-digit numbers and letters. Read the entire contents of the text file and return two strings, one with numbers only, the another one with letters only

python