Jack, growing up in the same hometown that I did, runs against the wind at a velocity of 2.0 m/s headed towards St. Peter's for 4.0 s and then remembers that he forgot to put on nice clothes so he turns around and runs with the wind at his back at 4.0 m/s for 4.0 s. Use positive values for against the wind and negative values for with the wind at his back. What is the average acceleration of George during the 8 second time interval in m/s^2? *