The pump is delivering hydraulic oil with a specific gravity of 0.85 at a rate of 20 gallons per minute. The pressure in the suction line is -3 psig while the pressure at 6 ft elevation of the discharge pipe is 40 psig. The energy loss in the system is 2.5 times the velocity head in the 2-inch pipe. Calculate the horsepower delivered by the pump to the oil.