engineer crossword puzzle

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Across
  1. 4. some one who engineer stuff
  2. 6. opposite of problem
  3. 9. the right amount
  4. 10. fly's around the world
Down
  1. 1. something that blows up
  2. 2. an engineer has to brain to build stuff
  3. 3. some one who design stuff
  4. 5. hard earth
  5. 7. 3 planets away from the sun
  6. 8. clean hands