I often see the following figure.
That figure explains to me that every contract account has four parameters for computing the global state root.
But I can't understand what parameters the externally owned account has for calculating the global state root.
I think the user's account should have two parabeters(nonce and balances) at least.
I'm sorry that I'm not good at writing English.
Thank you for your reading effort about my question.
editing ...
I find the answer from the website "https://medium.com/@preethikasireddy/how-does-ethereum-work-anyway-22d1df506369".
That says
[The account state consists of four components, which are present regardless of the type of account:]