arr[1] = 20;

 Case Study: Sarah's Sleep Patterns Sarah, a 35-year-old professional, has been experiencing sleep issues for several months. She reports difficulty falling asleep, frequent awakenings, and feeling unrefreshed in the morning. A sleep study reveals that Sarah spends a lot of time in Stage 1 and Stage 2 sleep but has very limited Stage 3 (N3)…

capacity : 3