A ball is thrown into the air by a baby alien on a planet in the system of Alpha Centauri with a velocity of 31 ft/s. Its height in feet after t seconds is given byy=31t−16t2.A. Find the average velocity for the time period beginning whent1=1 and lasting for the following number of seconds.01 sec:.005 sec:.002 sec:.001 sec: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=1.