Which of the following is considered NOT appropriate when setting up a video camera for the collection and analysis of 2D information? a. The plane of motion is perpendicular to the axis of the camera b. The camera is positioned horizontal to the ground (horizon) c. A calibration device of known length should be positioned in the plane of motion and the same distance from the camera as the performer d. The camera should be set on auto focus to enable fast adjustment to the moving participant and ensure non-blurry images