Who am I?

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Across
  1. 2. I help you learn new things in school
  2. 3. I catch criminals and keep you safe
  3. 6. I make all your furniture, tables and chairs
  4. 7. I grow the food that you eat
Down
  1. 1. I play a sport with a ball and a bat
  2. 4. I help you when you get sick
  3. 5. I sing the songs that you listen to