What am I?

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Across
  1. 5. I am a person who delivers letters and packages. (7 letters)
  2. 6. I am a domestic worker who cleans and maintains households. (4 letters)
  3. 8. I am a worker who repairs and maintains vehicles or machinery. (7 letters)
  4. 9. I am a brave individual who extinguishes fires and rescues people. (10 letters)
  5. 10. I am a person who serves food and drinks in a restaurant. (6 letters)
Down
  1. 1. I am a medical professional who treats illnesses and injuries. (6 letters)
  2. 2. I am a person who performs songs professionally. (6 letters)
  3. 3. I am someone who educates students in a school. (7 letters)
  4. 4. I am a law enforcement officer who catches bad people. (9 letters)
  5. 7. I am a skilled cook who prepares meals in a restaurant. (4 letters)