Help please!! If a ball is thrown straight up into the air with an initial velocity of 100 ft/s, it height in feet after t second is given by y = 100t – 16t^2

a.) Find the average velocity for the time period begining when t = 2 and lasting for the given amount of time.

0.5 seconds.

0.1 seconds.

0.01 seconds.

b.) Based on the above results, guess what the instantaneous velocity of the ball is when t = 2 seconds.