Six wells are used to depressurize a confined aquifer that lies beneath a planned excavation. If the aquifer head is to be reduced by 20 meters at the center of the excavation over a 45-day period, what is the total groundwater-pumping rate required if all wells pump at the same rate and the aquifer transmissivity is 40 m?/d and storage coefficient is 0.0006? Excavation 200 meters 120 meters