Ifa ball is thrown into the air with a velocity of 40 ft/s, its height in feet after t seconds is given by y= 40t - 162. (a) Find the average velocity for the time period beginning with t =D 2: (1).5 second (2).1 second (3) .05 second (4) .01 second (b) Find the instantaneous velocity when t 3 2. ft/s ft/s ft/s ft/s ft/s