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a) A piston is located in a cylinder containing water as shown in Figure Q1(b). An open U- tube manometer is connected to the cylinder. For the given equilibrium condition, the manometer reading are, h = 48 mm and h = 64 mm respectively. If force on the piston is 150 N, determine the diameter of the piston to ensure that the condition is in equalibrium. The weight of the piston is negligible. Water and mercury density are 1000 kg/mand 13600 kg/m respectively. [8 marks) Piston Water Mercury Figure 01(b): Cylinder tank with manometer