A 12 in. \(\times 6\) in. Venturi meter is installed in a horizontal waterline. The pressure gages read 30 and 20 psi. Calculate the flow rate for a water temperature of \(68^{\circ} \mathrm{F}\) and the head loss between the base and throat of the meter. Calculate the flow rate if the pipe is vertical with the throat of the meter \(2 \mathrm{ft}\) below the base and the pressure gages read the same values.