Issues Designing ER Diagram I'm trying to design an ER diagram in the relational database module of my course. We were given a scenario to draw a diagram for and then create a database within Access. I have the database covered, but want to be sure I'm on the right track for the diagram.
Scenario:

The model is for business functions within a car dealership. Minimum
and maximum cardinalities must be indicated. Entities and processes to
be considered include Customer; Cash Received; Cash; Salesperson; AR
Clerk; Sell Vehicle; Inventory.
A few assumptions must be made about resources and the payment event. Assume the company only sells inventory that is in stock, thus
customers will not be ordering vehicles and every sale is only for one
vehicle. Inventory is categorized based on model information.
Additionally, assume that the dealership has multiple cash accounts
and that customer payments are always deposited in the same cash
account. Since the dealership offers financing, customers can make
monthly payments on their vehicles so customers can buy now and pay in
installments later. Any other assumptions that need to be made should
be consistent with the business processes in a typical auto
dealership.

My answer (I don't believe I have a firm grasp on this at all -- I also don't have the ability to embed pictures yet):
https://i.stack.imgur.com/iZrv9.png
Thank you in advance for your help!!
Is that the whole problem statement?  How come AR Clerk, Salesperson, etc are not described anywhere?  You shouldn't just include only the entities listed.  The italicized paragraph contains more entities and processes that should be modeled.
You can't have 2 Customer entities in the diagram.  Draw another line from Customer to Receive Cash if you need to.  You should use a few sentences to define each entity so others know what you intend them to be.