If a ball is thrown in the air with a velocity 44 ft/s, its height in feet t seconds later is given by y = 44t − 16t2.. (a) Find the average velocity for the time period beginning when t = 2 and lasting . (i) 0.5 second.. ft/s. . (ii) 0.1 second.. ft/s. . (iii) 0.05 second.. ft/s. . (iv) 0.01 second.. ft/s