Ralph nader

If we have a network-shared folder encrypted by 7zip, and user A opens the archive but does not extract the folder. Will the password be required if user b wants to open but not extract the archive? If user A extracts the entire contents of the archive and user b has a file open within the archive but user b has not extracted the archive, what will happen as user a is extracting the entire archive If user a and user b have the same file open at the same time, will the file become read-only, until...