Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to deal with cramps when you're not home [title] Take deep breaths. [step] Deep breaths flood your blood with oxygen and can reduce muscle cramps. Breathe in deeply through your nose and out through your mouth, letting your belly relax outward as you draw air deep into your diaphragm.

Ending1: Pay attention to the way your abdomen feels. [substeps] Notice that your abdomen isn't a warm, smooth area. Ending2: Either hold your breath in or hold it for 10 seconds, followed by inhaling deeply for four seconds. Repeat seven to 10 times daily for the best results. Ending3: You can perform a set of 10 deep breaths for optimal relaxation. This can easily be done in class or in your office. Ending4: [substeps] When breathing, keep your shoulders pinned back and your chest puffed out. Slowly relax your chest and abdominal muscles, starting from the bottom of your rib cage and extending from your abdomen, to your nape.

Answer format: ending1/ending2/ending3/ending4