I need this answered to prepare for exam. The storativity of a confined aquifer is found to be 6.8 x 10-4 as a result of a pumping test.

I need this answered to prepare for exam.The storativity of a confined aquifer is found to be 6.8 x 10-4 as a result of a pumping test. The thickness of the aquifer is about 50m and the porosity is about 0.25 .a. What percent (fraction) of the storativity is contributed by the expansion of the water ?b. What percent (fraction) of the storativity is contributed by the compressibility of the aquifer porous media.?c. If the piezometric surface is lowered about 5 meters over an area of about 1 square kilometer, how much water will have been pumped from this aquifer?