The conclusion part where they declare their independence and explain what this independence brings them is the section you're looking for. The signers assert to uphold their duty by saying that they will pledge their lives and their sacred honor to defend the aforementioned truths and their independence.
Achilles enters the battle to avenge the Patroclus;s death. I am pretty sure this is right, because this is what I am studying right now too! :)
Completely, its describing to the degree of which he answered the question
On stuff like goods and stuff for himself