Show Intro/Instructions 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 four-hour time intervals are shown in the table. t (hr) r(t) (L/h) 0 9.9 4. 9.3 8 8.7 12 16 7.7 20 7.2 8.2 Find lower and upper estimates for the total amount of liquid that leaked out. lower estimate = liters upper estimate = liters