Liquid leaked from a damaged 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. t (hr) r(t) (L/h) 0 10.7 2 10.4 4 10.1 6 9.9 8 9.6 10 9.3 Find lower and upper estimates for the total amount of liquid that leaked out. lower estimate = upper estimate = liters liters

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