simple Javascript homework

hey, my friend was looking for help for a simple JavaScript project for Uni, i haven't touched Java for 6 years now, totally forgot the basics ngl lol.
if anyone can help i'd appreciate it.
Project requirements: https://pdf.ac/1namhP (PDFfiller.com Share Link)
Progress so far: Dropbox - Java project.zip - Simplify your life
if you prefer to view the documents in any way that's more comfortable to you than downloading anything please lemme know the method below and i'll make sure to follow, Thank you in advance.