A bee is making a beeline for its hive.  Its velocity is measured at a distance of 75 meters from the observer and again at distance 145 meters from the observer.  The clock times at these two positions are t = 9 sec and t = 16 sec, and the measured velocities are 3 m/sec and 13.5 m/sec.   What is its average velocity during this time?   What is its average acceleration during this time?  Is it possible that the acceleration is uniform?