1) The document discusses shutter speeds and panning techniques in photography. It explains that shutter speed controls the duration that light strikes the sensor or film, with faster shutter speeds freezing motion and slower shutter speeds blurring it.
2) Panning involves following a moving subject with the camera using a slower shutter speed than would otherwise be needed if the camera was static. This allows the subject to remain in focus while the background blurs.
3) The exercise recommends taking photos at different shutter speeds - fast speeds to freeze motion, slow speeds to blur motion, and panning shots between 1/15-1/125 sec to follow a moving subject.