Time (s) Velocity (ft/s) Time (s) Velocity (ft/s) You and a companion are driving a twisty stretch of road in a car with a speedometer but no odometer. To find out how long this road is, you record the car's velocity at 10-second intervals. 0 70 39 10 33 80 17 20 17 90 26 30 39 100 33 40 48 110 23 50 17 120 35 60 16 a. Estimate the length of the road using left-endpoint values. b. Estimate the length of the road using right-endpoint values. O