star trek birthday puzzle

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Across
  1. 4. Something incapable of happening
  2. 5. A misspelling and mispronunciation of a friend of Hobbes
  3. 6. Half of an All Terrain Armored Transport
  4. 7. the only definite article in the English language
  5. 8. a homophone for when you add up numbers
  6. 9. A dense, soft, heavy cloth made by rolling, pressing, and matting fibers together with heat, moisture, and pressure instead of weaving or knitting.
  7. 11. "I don't want to do my homework, but I _____ do my homework"
Down
  1. 1. The Mariana Trench is at this point on the planet Earth
  2. 2. A fuel used for warp drive
  3. 3. A homophone for an animal that lives in an apiary
  4. 8. put things in a special place for future use
  5. 10. the only definite article in the English language