So
green bikes:20
yellow bikes:20. but don't really understand
blue bikes:22
Don't look at this comment.. I messed up the first time so, yeah.
Answer:
The correct option is 1.148 < σ < 6.015
Explanation:
The 99% confidence interval for the standard deviation is given below:

Where:


Therefore, the 99% confidence interval is:


Therefore, the option 1.148 < σ < 6.015 is correct