Double-acting cylinder travels forward and reverse. Piston diameter 50mm, piston rod diameter 20mm, at a supply pressure of 600kPa. a. Write the formula to calculate the force exert on the piston rod with relation of pressure, p and area, A (ignoring friction) F= b. Calculate the effective area of piston side and piston rod side. (4 marks) (5 marks) c. By using the formula at 2.a, calculate the forward force, F, and reverse force, F, exert on the piston rod during forward and reverse movement. (5 marks)