An astronaut uses a stop watch to time the motion of a rock in outer space. At time t = 17 seconds, the rock is at a location < 4, -3, 5 > m. At a later time t = 39 seconds, the rock is at position <-3,-1,1 > m. What is the average velocity of the rock over this interval of time?
< -0.318 ____________, __________ > m/s