The closed pressurized tank shown has a side that is inclined at an angle of \theta = 55^\circ. At the top of the inclined side there is a semi-circular gate (ABC) of radius R = 2.4 \, \text{ft}, hinged along its diameter AC. Crude oil fills the tank to the same elevation as AC. The pressure in the air above the oil is observed to be p_0 = 0.2 \, \text{psi}. If the weight of the gate is negligible, determine the magnitude of the torque required to keep the gate closed (against the resultant hydrostatic force). Indicate: 1. The direction of the torque, 2. The centroid location, 3. The center of pressure (line of action) of the gate