Hi, Best to check which type of ER diagrams you will need to use, those are crow's feet notation https://vertabelo.com/blog/crow-s-foot-notation/ If you want to model using UML: https://www.tutorialspoint.com/uml/uml_basic_notations.htm Have a look through both of the guides (there are more for other notation styles), and see what is the appropriate way to plot out your cardinalities, and use of symbols. Thanks, Adam.