A small mailbag is released from a helicopter that is descending steadily at 2.72 m/s. (a) After 4.00 s, what is the speed of the mailbag? V = m/s (b) How far is it below the helicopter? d = m (c) What are your answers to parts (a) and (b) if the helicopter is rising steadily at 2.72 m/s? V = m/s d= m