A pump is used to fill a tank with oll (5G=.9. Vapor pressure =2.75 psia, viscosity =4CP). A pressurized tank is used to fill an elevated tank at a velocity of 5ft/5. The fanning friction factor has been found to be 0.0056. The feed tank is used to transfer the liquid to the elevated tank 700 feet above the purnp and open to the atmosphere. The pump is 5hP, h= 0.6, with an NPSHr of 40 psig. The suction side piping is 100 feet, 25chedule40 carbon steel, and the discharge piping is 1000 What is the minimum height that the feed tank must be to keep the pump from cavitating