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. r(t) (L/h) t (hr) 10.9 10.6 4 10.3 6. 10 8 9.7 10 9.4 Find lower and upper estimates for the total amount of liquid that leaked out. liters lower estimate = liters upper estimate =

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