Calculate the flow rate in a reservoir 2,000 ft long, having a permeability of 70 md. The reservoir is 500 ft wide, and 15 feet of net pay thickness. The oil in the reservoir has a viscosity of 3 cp. The pressure at the right end is 1500 psia, and the pressure at the left end is 3200 psia. Calculate the flow rate? (15 pts)