Starr is trying to play it cool , which insinuates that starr is not concerned, but that fact that she/he has to "play" it cool shows that he/she is actually concerned and not bothered.<span />
        
             
        
        
        
By reading the text you'll be able to come up with a answer.
 
        
                    
             
        
        
        
Answer:
You <u>should </u> stop when the traffic lights are red .