An illustration of the washing machine is shown below. During the operation of the washing machine, a rotating unbalance happens as shown in the Figure. The drum is free to move vertically but assumed to be fixed horizontally. Chassis Panel -Springs Unbalanced load Dampers Non-Rotating Drum Rotating Drum a) Build a SDOF lumped parameter model in the vertical direction (label as y) assuming that chassis panel is fixed. b) Find the vertical displacement. c) Find the force transmitted to the chassis panel. d) The displacement and force transmitted to the chassis panel are found to be unacceptable. Therefore, an undamped dynamic vibration absorber will be designed. If the added stiffness value is 5x105 N/m, find out the mass of the absorber. What is the resulting amplitude of the drum and the added mass?