Final answer:
The reliability of sprinkler systems cannot be addressed with the provided data, as it requires specific performance data.
Step-by-step explanation:
The reliability of sprinkler systems cannot be determined from the information provided. When assessing the reliability of sprinkler systems, one would typically look at statistical data and failure rates, not water withdrawal percentages or probability distributions for repair times. To establish a specific percentage of reliability, one would need data on the performance of sprinkler systems in various conditions, which is not given in the reference information.