Find the range of the following distribution.
 
Age (in years) \(16 - 19\) \(19 - 22\) \(22 - 25\) \(25 - 28\) \(28 - 31\) \(31 - 34\)
Number of students \(0\) \(4\) \(6\) \(8\) \(2\) \(2\)
 
Answer:
 
Range \(=\)  .