Put these times in order, from shortest to longest:
15 minutes, 5 minutes, 15 hours, 15 seconds
15 seconds, 5 minutes, 15 minutes, 15 hours
15 minutes, 15 hours, 5 minutes, 15 seconds
15 hours, 15 minutes, 5 minutes, 15 seconds
5 minutes, 15 minutes, 15 hours, 15 seconds