A ball is thrown into the air by a baby alien on a planet in the system of Alpha Centauri with a velocity of 45 ft/s. Its height in feet after t seconds is given by y = 45t 27t. A. Find the average velocity for the time period beginning when t=2 and lasting. .01 s: .005 s: .002 s: .001 s: NOTE: For the above answers, you may have to enter 6 or 7 significant digits if you are using a calculator. Estimate the instanteneous velocity when t=2.