linux question using git bash

have the code.. but it doesntbl run please can u give step by step process to execute

Given a list of filenames, write a script called older.sh that returns the oldest file. That is, typing older list will return the name of the oldest file in the list. When you are testing your script, it may be useful to use the commands touch-t 202103081800 foo, touch -t 202103081801 goo, and touch-t 202103081802 hoo to create three dummy files, foo, goo and hoo to work with. Include written documentation about your shell script. Put the code of your shell script on Github so it can be checked