Answer:
Serena's perception of her friends' vacations affect her view of her own by, her seeing that they had fun and she didnt really have much fun on her vacation
Explanation:
 
        
             
        
        
        
The old man. His name is The old man
        
                    
             
        
        
        
If you mean dispersion it mean splitting light into 7 parts.
They are used to create artificial rainbow effects
        
             
        
        
        
Of what word? If you have more info I could answer