If a ball is thrown straight up into the air with an initial velocity of 70 his, its height in feet aftert seconds is given by y = 7m: 16f? Find the average velocity for the time period begining when t = 2 and lasting (i) 0.1 seconds E] (ii) 0.01 seconds C] (iii) 0.001 seconds I:] Finally based on the above results, guess what the instantaneous velocity of the ball is when 13 = 2. C]