Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to swing a baseball bat [title] Line your feet up beneath your shoulders. [step] Place your feet shoulder width apart or slightly wider. Your feet should be parallel to one another and aligned directly under your shoulders.

Ending1: Your shoulders should, ideally, be parallel in relation to the thrower. [title] Put your left knee (should be pointing at the thrower) in front of you. Ending2: [substeps] The width of your feet should be between 30 to 70 degrees. Your front feet will act as the focal point of your swing, which is important in hitting the ball. Ending3: If you're right handed, your left side should be facing the pitcher, with your head pointed in the direction the ball will be coming from. If you're left handed, it will be your right side. Ending4: As you swing the bat, keep your shoulders square and relaxed. [substeps] Let your shoulders and back move forward in a counter-clockwise movement.

Answer format: ending1/ending2/ending3/ending4