Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to do push ups if you can't now [title] Start with wall push ups. [step] Stand three to four feet away from a wall and face the wall. Lean toward the wall and place your hands shoulder-width apart.

Ending1: Slowly bend your elbows to lower yourself to the wall. Once your chest touches the wall-or nearly does so-push up until your arms are straight but slightly bent. Ending2: Breathe in as you lift up with your arm as high as you can. Hold the position for 10 to 30 seconds before lowering back down. Ending3: Don't lift your back as high, your chin should be facing towards your back. Hold these holding positions for about 3 breath cycles while repeating this again with a partner. Ending4: Keeping your core engaged you gradually push up until your chest is almost perpendicular to the wall, keeping your back flat with an arm extended out to to form a " v " shape. Return to the ground with your chest out.

Answer format: ending1/ending2/ending3/ending4