Percy Jackson and the chalice of the gods

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Across
  1. 3. who is the protagonist
  2. 5. who sent percyon this quest
  3. 6. who's staff did percy wash
  4. 7. where does percy want to go to university
Down
  1. 1. who is percy's best friend
  2. 2. who is percy's dad
  3. 4. what are they trying to find