Extracted text: 3. (Modified version of Problem 5.39 in the text). An unconfined sand aquifer with a surface area of 10,000 m? experiences a 1 m water level drop. The porosity and specific yield for the sand aquifer are given as 0.34 and 0.25, respectively. a. Calculate the volume of water that would be released from the aquifer. m3 b. How much water would remain in the drained portion of the aquifer?