Oil leaked from a tank at a rate of r t liters per hour The rate decreased as time passed and values of the rate at two hour time intervals are shown in the table In this problem we are going to estimate the total amount of oil that leaked out during this ten hour time period t hours 0 2 4 6 8 10 r t L hr 9 4 7 7 7 3 5 9 4 8 4 1 Rate of Oil Leakage Left Endpoint Approximation Estimate the total amount of oil that leaked out using left endpoints Total Amount of Oil Right Endpoint Approximation Estimate the total amount of oil that leaked out using right endpoints Total Amount of Oil liters liters