4. Led Foot drives his car carelessly into another car. The second car contains dynamite, a fact that Led had no way of knowing. The collision causes an explosion, which shatters a window of a building half a block away on another street. The flying glass inflicts serious cuts on Sally, who is working at a desk near the window. The explosion also harms Vic, who is walking on the sidewalk near the point of the collision. Toward whom is Led Foot negligent?