A tree and a pole are 3000 m apart. Each is suddenly hit by a bolt of lightning. Mark, who is standing at rest midway between the two, sees the two lightning bolts at the same instant of time. Nancy is flying her rocket at v = 0.5c in the direction from the tree toward the pole. The lightning hits the tree just as she passes by it. Define event I to be " lightning strikes tree" and event 2 to be " lightning strikes pole." For Nancy, does event l occur before, after, or at the same time as event 2?