s and z

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Across
  1. 3. what you do at a red traffic light
  2. 4. the opposite of difficult
  3. 6. belongs to her
  4. 8. thirty divided by five
  5. 9. the past tense of is
  6. 10. a lot of this is found at the beach
  7. 11. the one after first
Down
  1. 1. having many things to do
  2. 2. third person form of do
  3. 5. the past tense of sit
  4. 6. belongs to him
  5. 7. to say no
  6. 8. opposite feeling to happy
  7. 10. something you sing
  8. 11. feeling unwell