The bottom corner of the water tank in Figure 2 is a curved gate AB in the form of a quadrant of a circle with centre O. The gate is 3 m wide (perpendicular to the paper) and the water stands above it as shown. Determine (a) the horizontal component of the hydrostatic force on the gate (in kN), (b) the vertical component of the force on the gate (in kN), and (c) the resultant force on the gate (in kN).