4. As shown in Fig. 2 an inclined fluid-filled manometer is used to measure the pressure of the gas within the reservoir. (a) Using the data from the figure, determine the gas pressure, in lbf/in. (b) Express the pressure as a gage or a vacuum pressure, as appropriate, in lbf/in. (c) What advantage does an inclined manometer have over a U-tube manometer? Gas Oil (p=54.2 lb/ft) Fig. 2 40 Palm 14.7 lbf/in. 8=32.2 ft/s 15 in.