Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to do squats and lunges [title] Stand erect with your feet approximately one shoulder width apart. [substeps] From there, you can widen or narrow your stance depending on which muscles you are targeting-a wider stance works the hamstrings and glutes, while a narrower stance works the quads. Point your toes slightly outwards, as this helps to stabilize your stance.

Ending1: Stretch the bottom of your feet so that the heel of one foot is flat on the floor. A variation of this exercise is to rotate forward on one foot, the other helping to keep your hips close together. Ending2: [title] Make sure your feet are slightly wider than shoulder width. [substeps] It is best to squat at this exact level to make sure you are able to execute these basic push-ups safely. Ending3: [title] Jump onto a dumbbell (if available). [title] Squat down and slide your foot off the bar, keeping your pelvis slightly off the floor. Ending4: Keep your arms extended in front of you. [title] Push your hips back, slowly bending your knees to a 90 degree angle.

Answer format: ending1/ending2/ending3/ending4