3. In a time of t seconds, a particle moves a distance of s meters from its starting point, where s = f(t) = 2 + 1. (a) Find the average velocity between t = 2 and t = 2 + h if h = 0.1, h = 0.01, and h = 0.001. (That is, compute the average velocity over 3 different time intervals). (b) Now, give your best estimate of the instantaneous velocity of the particle at t = 2