Speedometer readings for a vehicle (in motion) at 4-second intervals are given in the table. t (sec) 0 4 12 16 20 24 v (ft/s) 0 8 28 50 63 61 45 Estimate the distance traveled by the vehicle during this 24-second period using the Riemann sums L6, R6 and M3. L6 = feet RG = feet M3 = feet