Suppose a gauge at the outflow of a reservoir measures the flow rate of water in units of ft3 hr The total amount of water that flows out of the reservoir is the area under the flow rate curve Consider the flow rate function shown in the figure to the right Complete parts a through d below Water flow rate f hr 7500 6000 4500 3000 1500 0 Ay a Find the amount of water that flows out of the reservoir over the interval 0 4 The amount of water that flows out of the reservoir over the interval 0 4 is Simplify your answer Type an integer or a decimal 0 2 ft ft A Time hr 00 8 110