Match each function with its corresponding graph.
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  1. 12345-1-2-3-4-512345-1-2-3-4-5
  2. 12345-1-2-3-4-512345-1-2-3-4-5
  3. 12345-1-2-3-4-512345-1-2-3-4-5
  4. 12345-1-2-3-4-512345-1-2-3-4-5