Oil of specific gravity 0.88 flows through the horizontal venturimeter in the figure. A mercury (S = 13.6) differential manometer is connected between the inlet section 1 and the throat 2, and shows the deflection h marked on the figure. Taking C_{d} = 0.97, determine (a) the venturi head h_{v} = (p_{1} − p_{2})/ρ_{oil}g (answer in m of oil), (b) the discharge (answer in L/s) and (c) the pressure difference p_{1} − p_{2} (answer in kPa).