The velocities (in mi/hr) of an automobile moving along a straight highway over a 2-hr period are given in the following table. t (hr) v (mi/hr) 0 0.25 0.5 0.75 1 1.25 30 30 50 50 45 60 1.5 30 1.75 2 50 80 a. Sketch a smooth curve passing through the data points. b. Find the midpoint Riemann sum approximation to the displacement on [0,2] with n = 2 and n = 4. a. Choose the correct graph below. A. Av 80- 70- 60- 50- 40- 30- 20- 0 1 0.5 1.5 2 B. Av 80- 70- 60- 50- E 40- 30- 20- 0 0.5 1 1.5 2 b. The midpoint Riemann sum approximation to the displacement on [0,2] with n = 2 is (Type an integer or a decimal.) The midpoint Riemann sum approximation to the displacement on [0,2] with n = 4 is (Type an integer or a decimal.) miles. miles. C. Av 80- 70- 60- 50- 40- 30- 20+ 0 0.5 1 1.5 2 O D. Av 80- 70- 60- 50- 40- 30- 20- 0 0.5 1 1.5 2