You manage a computer running Windows 2000 Professional that belongs to a workgroup. You create a new user account （Tony） on that computer that is not a member of the Administrators group. You log on using the new account. You create a file with notepad in a folder that is on a volume formatted with NTFS. You encrypt the file. You give another user account defined on that computer， Luis the permission to take ownership of the file. Luis logs on using the account and takes ownership. However， she receives an error message reporting that access is denied when she tries to open the file. What can you do to allow Luis to open the file？（）