No way you need to look at picher than answer
Dan Cody is a wealthy copper mogul whom Jay Gatsby saves. In gratitude, Cody hires Gatsby as a personal assistant and introduces him to a life of wealth and luxury. Symbolically, Cody represents the lifestyle and wealth that Gatsby wants.
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All of the above I hope it helps..........
They fight with them because the Montague men tried to rile them up to start a fight in the first place, that way they can claim that they were defending themselves because the Montagues attacked them first
it helped him create realistic songs