Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to heel flip [title] Position your feet correctly. [step] Put the toe of your back foot at the corner of the tail. Place your front foot in the middle of the board, closer to the nose.

Ending1: The folded corner of the tail should be facing the tail. The two flaps of foam should rest on the board together. Ending2: The toe of your front foot should hang off the edge a bit. [substeps] Your feet should be parallel with each other, creating a sort of diagonal line across the board. Ending3: Lift your front foot by placing the heel of your back foot on the board, and place the front foot right behind the tail of the board. [substeps] Your back foot should be situated slightly higher than your front foot, with the heel of your back foot directly above the tail. Ending4: You might feel the tail slightly lifting from under you but that's alright. You can place your entire foot in motion just like you would to flip a tennis ball.

Answer format: ending1/ending2/ending3/ending4