Indigo Week 4

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Across
  1. 3. It's on top of a helicopter
  2. 4. This type of guitar does not use electricity
  3. 5. Not getting enough nutrition
  4. 8. Play practice
  5. 9. Usable
Down
  1. 1. Proof for something
  2. 2. Early stage of the stone age
  3. 6. The process of taming animals for farming
  4. 7. Something used for a loan incase you can't pay it off