Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to do a scissors twist with an exercise ball [title] Put your exercise ball in an open space. [step] Make sure there's nothing nearby that could distract or hurt you as you exercise. [title] Lie down on your back with one of your legs on top of the ball and the other right next to it on the ground.

Ending1: [title] Put your right arm over your head, or do an oval figure 8. [title] Put some more exercise ball in the yard. Ending2: [step] Your leg should be slightly bent to give you a more stable grip that allows you to grab on to the ball and hold it steady while you do the exercise. [title] Place your hips hip-width apart to start a straight twist. Ending3: [step] Prop yourself up slightly on your elbows so that you're looking at the ball, with your hands pressed palm-down to the ground. [title] Squeeze the ball between your lower legs/ankles and lift it up from the ground. Ending4: [title] Bend your left knee to reach your partner's left knee. [title] With your left leg on top of the ball, bend your left knee so that the flat part of your foot is touching your partner's knee.

Answer format: ending1/ending2/ending3/ending4