applying different css to multiple tables in one html document

Hello! I’m taking an HTML course at school and this class is very self-taught as it’s a distance-learning (online) class so I’m turning to the StudyPool community for help! So for one of my assignments, the professor is asking us to make 4 copies of a table we created earlier all in the same document and then apply different CSS styles to each one of them. It’s easy enough to duplicate a table 3 more times but I’ve followed tutorials online on how to apply styles to the tables but I can’t find anything that tells me how to use different styles on multiple tables on the same page.

I’ve attached my HTML (it contains four copies of the table) and my CSS in a zip file if anyone needs to see what I’m doing.

***Also it’s due by 11:59pm EST (in 1 hour and 53 minutes) so I’m in need of some immediate help please!***