Character Sociogram

The concept of using a Sociogram is to find out who the most "connected" character in a story is. By connected, I mean the character that knows the other characters and has the most knowledge of the other characters in a story. Who knows who, how they know them, and how they know the other characters.

In a Sociogram you map out the relationships between characters. I would like you to do this for The Great Gatsby and from your results tell me who the most connected character is. Before you begin, I want you to guess and write down who you think the most connected character is and   then do the Sociogram and find out who the most connected character is. 

Was your guess right or wrong? If it was right, how did you figure out this person was the most connected? If it was wrong, does the right answer surprise you, and why did you think the character you guessed earlier was the most connected?