The figure below shows a mechanical assembly consisting of a horizontal piston-cylinder assembly that contains a pressurized gas with a pressure larger that the atmospheric pressure, Patm = 1.105. Initially the piston is locked with a pin such that it does not move. On the outside of the assembly there is a spring of known elastic constant, k = 1.104 The piston has two circular surfaces of equal area, N m A = 0.025 m. Initially, as shown in the figure, the spring is at its non-deformed position, neither stretched nor compressed. Next, the locking pin is removed, and the piston moves to the right until it finds a new equilibrium position. Please answer the following questions. Gas Piston, A= 0.025 m mm Patm = 1x105 N/m Spring, k = 1x104 N/m Locking pin a. Indicate all the important forces you would include on a free body diagram (FBD) for the horizontal forces acting on the piston before the locking pin is removed. Note that the friction between the wall of the cylinder and the piston is neglected. O Fgas = force due to gas O Rx = reaction force due to pin O Fatm force due to atmosphere O Fs force due to spring