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Simplify the rational expressions, and identify any non-permissible values.

1. \(\frac{{4c}}{{ab}} \cdot \frac{{5a^2 }}{{2bc^2 }}\)
   
   
   
   
2. \(\frac{{7\left( {q - 2} \right)}}{{\left( {p + 2} \right)}} \cdot \frac{{3\left( {p - 2} \right)}}{{21\left( {q - 2} \right)}}\)
   
   
   
   
3. \(\frac{{r^2 - 9r + 14}}{{r^2  - 16}} \cdot \frac{{2r + 8}}{{r^2 + 5r - 14}}\)