Given the function f(x), we compute f'(x) and call it derivative of function f(x). For instance, if you were to jump out of the airplane at 10,000 feet above earth, gravity will pull you toward earth. Height (in feet) at time t (seconds) is given by formula h(t) = 10000 - 16t2. Derivative of the function is d'(t) = -32t. In your own words, and be brief, what does derivative tell us? a) How fast am I traveling at given time t = 20 seconds? b) How fast am I traveling at given time t = 30 seconds?