2. Calculations (50 points) (1) As shown in Figure below, the U tube mercury manometer is used to measure the pressure ps within a sealed tank. Now we know the positions zi=2.4m, 22=0.3m, 23 =1.8m, 24 =0.5m, zs =3.0m. Please give the hydrostatic equilibrium equation and calculate ps. (15 points) 5 Ps 5 3 4 4 2 || 2