the system shown in the image below consists of 1200 m of 5cm cast iron pipe, two 45o and four 90o flanged long-radius elbows, a fully open flanged globe valve, and a sharp exit into a reservoir. if the elevation at point 1 is 400 m, what is the gage pressure required at point 1 to deliver 0.005 m3/s of water at 20oc into the reservoir? 20 pts.