Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to run a 200 m dash [title] Set your blocks. [step] Find your assigned lane and use the length of your feet to gauge where to place the blocks. The tip of the unit should measure about a foot length from the starting line.

Ending1: It's basically like starting your run on skates in this case, we need to target your front-end. [substeps] Pick a distance away from your line of retreat from your lane. Ending2: Start out running parallel to your lane, moving off by two or three feet. Repeat until the distance you started is your desired distance. Ending3: [substeps] The radius of the blocks should be parallel to the length of the running lane. The edge of the block should be about half an inch from the edge of the lane. Ending4: The front pedal should be 2 to 2 1/4 foot lengths from the starting line. The back pedal should be 3 to 3 1/4 foot lengths from the line.

Answer format: ending1/ending2/ending3/ending4