A weighted piston confines a fluid density p in a closed container, as shown in Fig. 13.1. The combined weight of piston and weight is 200 N, and the cross-sectional area of the piston is A = 8.0 cm2. Find the total pressure at point B if the fluid is mercury and A = 25 cm (pHg = 13600 kg/m3). What would an ordinary pressure gauge read at B?