5  
 
                                                                                                                                                                                                                                          VCD           (     )                                                                                (                         )                                                                                                                   
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
 
                  6 
 
                                                                                                                                           -                                                                                                                                                                                                                             
                                 
                            