Calculate the class interval of the required class.
 
Class
\(1\)
\(2\)
\(3\)
\(4\)
\(5\)
Interval
1.3 -  14.114.1 - 23.523.5 - 36.836.8 - 4444 - 52.1
 
The class interval of class \(5\) is .