Answer: 1. The Greeks need Achilles to help win against the Trojans.
2. I think is either "For not only is Achilles a great warrior, but he is also dear to Zeus—and he who is dear to Zeus is worth armies of men.'" or "Without Achilles, the Greeks could not stand against the strength and fury of Hector, who slew many and stripped them of their armor."
Explanation: i did my research on this topic