For the following position function y = s(t), an object is moving along a straight line, where t is in seconds and s is in meters. s (t ) = _t + 5 (a) Find the simplified expression for the average velocity from t = 4 to t = 4 + h. (b) Find the average velocity between t = 4 and t = 4 + h, where h = 0.1, h = 0.01, h = 0.001, and h = 0.0001. (Round your answers to three decimal places.) h average velocity 0.1 0.01 0.001 0.0001 (c) Use the answers from part (b) to estimate the instantaneous velocity at t = 4