Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to overcome exam tension [title] Get enough sleep to keep you energized for your exam. [step] Not sleeping right can affect your mood, leading to an excess of stress. In the weeks leading up to the exam, make sleep a priority.

Ending1: Strive for solid nights of high-quality sleep. [substeps] If you're still in high school, aim for 8.5 to 10 hours of sleep a night. Ending2: Getting 5-7 hours of sleep a night will allow you to stay energized during test time and to pass the exam safely. [substeps] Get 7 to 9 hours of sleep every night to keep your face in a healthy state. Ending3: [substeps] Go to bed at your normal bedtime to avoid interruptions during the test that could disrupt your wake up time. Set a consistent sleep schedule and stick to it. Ending4: Going to bed hungry and tired can contribute to stress. To help ensure that you feel rested, go to bed around 9 pm.

Answer format: ending1/ending2/ending3/ending4