Optical table Absorber system www Table Primary mass m F(t) = Fo sin(wt) ka k/2 k/2 Legs ma Model x Figure 5.14 An optical table protected by an added vibration absorber. The table and its supporting legs are modeled as a single-degree-of-freedom system with mass m and stiffness k. (10 points) You are designing a tuned-mass damper (TMD) system as depicted in Inman Fig. 5.14. Despite having no dashpots present, all real systems have some damping. Indicate all that are true: (a) The real response cannot be absolutely zero at the design frequency. (b) Minimal damping is desired for operation at the design frequency. (c) Minimal damping may cause undesired effects away from the design frequency.