Skydivers jump from a plane at intervals of a few seconds. If two divers wish to join up as they fall,

Skydivers jump from a plane at intervals of a few seconds. If two divers wish to join up as they fall, the second must catch up with the first.

a If one diver is more massive than the other, which should jump first? Use the idea of forces and terminal velocity to explain your answer.

b If both divers are equally massive, suggest what the second might do to catch up with the first.