create bash script

Please help with homework it reads like this. After being frustrated by having to create users and groups with individual commands, you has been asked to develop a bash script that will facilitate administrative functions. I never created a bash script and my school book don't tell me anything. I need to create a bash script that offers a menu of choices including: adding a user--I have to do this one can you help ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Exclusive and complete copyrights to all work purchased. (No GPL, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site). ## Platform I have win2000 but I have Red Hat Linux 8 released on a VMware machine. I need to created the bash script for Red Hat Linux.