Music crossword puzzle

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Across
  1. 3. What has 6 strings?
  2. 4. What has 4 strings?
  3. 6. What has white and black buttons?
  4. 7. Is an guitar but is more like an sircle?
  5. 8. What is an set of banjos called?
Down
  1. 1. What is a tube whit holes in it?
  2. 2. What is an trumpet whit buttons?
  3. 5. What is an verticle piano whit strings instead of buttons?
  4. 7. Guitar but more bassie