a very hard cross word

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Across
  1. 6. a mythical creature
  2. 7. Ginny weasleys middle name
  3. 9. a mother works as a
  4. 10. a type of money
Down
  1. 1. harry potter is sirius black's
  2. 2. a presidents first name
  3. 3. a villan who says riddles
  4. 4. a animal
  5. 5. you go to Hogwarts to learn
  6. 8. steven Hawkings middle name
  7. 11. Albert Einstien uses a