You should first determine the what you already know about the topic, how accuracy the information is
        
             
        
        
        
It was to give the audience pre-existing knowledge about the play that would help with the understanding of the play and its conflicts and often it foreshadows something that is going to happen... for example the begging of Romeo and Juliet when the chorus tells us that there is a feud between the two families and how it was a tragedy of star crossed lovers.
        
                    
             
        
        
        
Answer:
2)
Explanation:
Atticus represents reasoning and is even-handed throughout the entire story. he even does this with his children, whilst also doing it with all of Maycomb. His role is to see peoples opinions and be open-minded. 
Similarly, in an inspector calls the inspector has one goal. Which is to try to depict a different perspective towards the Birlings. This is so that they feel guilty about what they did to Eva Smith. As Priestley wanted to use the inspector as a mouthpiece so to speak, which means he wanted to illustrate his ideas and opinions of socialism through the inspector. 
 
        
             
        
        
        
More explanation please we need the story to answer or is this Sunday school stuff