Please choose the correct ending to complete the given sentence: Health: [header] How to reset sleep cycle [title] Leave yourself enough time. [step] Your sleep cycle should include the right amount of sleep each night. This usually changes if your sleep cycle gets off.

Ending1: Most people need between eight and 12 hours of sleep a night, so this might be a good amount to split up between down time and sleep deprivation. Therefore, it's best to stick to one to two hours of sleep per night. Ending2: If you are a teenager, you need about nine to 10 hours of sleep a night. If you are an adult, you should get seven to nine hours a night. Ending3: Basically, go to sleep way less than you did the night before. [title] Experiment with what works and doesn't work. Ending4: If you're unable to sleep, set a time to reset your sleep cycle every night. [substeps] For example, you might set your nightly alarm to go off at 11 am or get up in the wee hours of the night.

Answer format: ending1/ending2/ending3/ending4