You have stored confidential financial data in a shared folder named AccSecured on your Windows 2000 Professional computer. Your company hires an intern named Richard.  You create a subfolder named intern, which Richard needs to access. You want to allow Richard access to the intern subfolder only. You create a user account named intern. You want to allow the intern user account the ability to update, create, and delete files within the intern folder. You need to prevent Richard from accessing any other files or folders within the AccSecured folder.  What should you do?（）