Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to do the windshield wiper stretch [title] Lie on your back. [step] The basic windshield wiper stretch is done from a supine position (i.e., lying face up) on the floor. Bend your knees so that your feet are resting flat on the floor, and extend your arms straight out to either side.

Ending1: Your hands should be just slightly outside your head, and your elbows should be straight out. Apply some tension to your tailbone and pelvis. Ending2: Place your arms behind your head so that your elbows are pointing upwards. [substeps] You can lift your legs or raise them in the air as you stretch, but the stretch should be in between your knees. Ending3: [substeps] Check the position of your shoulder blades. Your shoulders should be rolled back, with your shoulder blades flat against the floor. Ending4: [substeps] This stretch can be repeated repeatedly in several different ways, using different flexes. [title] Lift your legs up and over your head.

Answer format: ending1/ending2/ending3/ending4