From t = 0 to t = 5.00 min, a man stands still, and from t = 5.00 min to t = 10.0 min, he walks briskly in a straight line at a constant speed of 2.1...

From t = 0 to t = 5.00 min, a man stands still, and from t = 5.00 min to t = 10.0 min, he walks briskly in a straight line at a constant speed of 2.1 m/s. (a) What is his average velocity vavg in the interval 2.000 min to 7.80 min?1 . m/s (b) What is his average acceleration aavg in the interval 2.00 min to 7.80 min?2 m/s2 (c) What is vavg in time 3.00 min to 9.00 min?3 m/s (d) What is aavg in time 3.00 min to 9.00 min?4 m/s2