Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to have peace of mind [title] Breathe. [step] Intentional breathing is a simple activity, but it's one of the most powerful ways to create peace of mind. Emotions and breathing are closely connected.

Ending1: Feel peace in knowing that you are not alone. [substeps] Often, we feel our frustration, resentment, sadness, and depression. Ending2: [substeps] Practice gradually learning to breathe in and out slowly through your nostrils. This helps you breath more deeply and relaxes you further, particularly if you are regularly involved in strenuous situations, such as a workplace battle or a fight with one of your co-workers. Ending3: Ideally, all emotions, especially anger, are controlled in the brain through one thought. Doing this keeps us calm, and is considered cleansing. Ending4: If you slow your breath and learn to breathe evenly and fully, your emotions will calm down as well. Breathing practices have been shown to reduce cortisol, the stress hormone.

Answer format: ending1/ending2/ending3/ending4