Approval properties and XML Forms

I have a XML Form, in the Show render I want to see the status and the name of the user that approve the document, I found a state property that show the state of the document, but exist a way to show the name of the user that approve the document, I didn’t find a property to show that. Another questions, is possible to include the Approval menu (commands Submit for Approval, Reject, Approve, Archive) in the NewsExplorer Render

Thanks in advance

Maria Teresa