:    
       

 

       



           
    .         
             
   .           
           
       .     
            
           . 
             
            
   .          
               
      .         
           
.              
            
            
            
              
.      

              
             
              
.       

             
             
               
               
            
              
          .    
              
         .     
               
              
. 