A 6-kg mass attached to a spring with stiffness 480 N/m is moving along a straight line and is subject to linear friction force bu with coefficient b N. sec/m, but no external forces. (a) Determine the values of b for which the system is, respectively, underdamped; critically damped; overdamped. (b) Suppose that b = 96. Compute the quasi-period and the natural quasi-frequency of the resulting oscillations. Include the appropriate units.

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