A skydiver jumps out of a hovering helicopter. A few seconds later, another skydiver jumps out, so they both fall along the same vertical line relative to the helicopter. Assume both skydivers fall with the same acceleration. Does the vertical distance between them (a) Increase (b) Decrease, or (c) Stay the same? Does the difference in their velocities (d) Increase (e) Decrease, or (f) Stay the same?