Population and phone lines

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Across
  1. 3. Tools, systems, and methods used to solve problems
  2. 5. Arrangement of something across space
  3. 8. Number of people living in a place
  4. 9. Telephone lines that run through underground cables
  5. 10. Ability to obtain or make use of something
Down
  1. 1. Portable telephones that use cellular networks
  2. 2. Telecommunication lines linking two or more points
  3. 4. Process of sharing information
  4. 6. Compactness of population in a place
  5. 7. Arrangements of objects across space