PLEASE HELP Before meeting Gatsby, Nick observes the guests at the party. How does
he feel about them, the situation, and the elusive host? (Diction creates
Tone)

third person

explanation:

note the usage of names and pronouns, "james" & "the old man". this alone can confirm it as third person, as first person uses "i" and the like, while second person uses "you" and the like.

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but it is sometime nessary to hit key points or subjects   but is sometimes to much reveiw if there was a way to slim down the redone work it would improve for every body.