5. A cylinder of brass 6 cm high and 4 cm² cross-sectional area is suspended in water by means of a string so that its upper surface is 7 cm below the surface of the water, as shown in Figure. Determine (a) the force acting on the top of the cylinder, (b) the force acting on the bottom of the cylinder, and (c) the buoyant force acting on this cylinder. (35 Points) F1 7cm: 6cm $F2