Dad's Birthday Crossword

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Across
  1. 3. Prime age to be? (2 wds.)
  2. 5. Nikola on the road?
  3. 6. Like freeze tag or the name of a Scottish sitcom (2 wds.)
Down
  1. 1. Letters following “Chat”
  2. 2. Fitness program that sounds like a fantasy novel
  3. 4. Peaks’ opposite, according to James Hillman
  4. 7. __ and the Diamonds