Mercury 2 cm Plug. D=4cm 2. (20 points) The gate shown in the figure below is 5 ft wide, is hinged at point B, and rests against a smooth wall at point A. Compute (a) the force on the gate due to seawater pressure, (b) the horizontal force P exerted by the wall at point A, and (c) the reactions at the hinge B. ▷ 15 ft Pa Wall Seawater: 64 lbf/ft³ Hinge Gate 6ft