It takes a bat two seconds to fly from position (x,y,z) = (-2 m,-4 m, -3 m) to position (6 m, -2 m, -3 m)

1. what is the displacement in unit vector notation?
2. Determine the magnitude of the bat's displacement.
3. Determine the average velocity of the bat.
4. Is it possible to determine the average speed of the bat? If so, determine the average speed.