A-kg mass is attached to a spring with stiffness 39 N/m. The damping constant for the system 5 m to the left of equilibrium and given an initial leftward 12 is 4 N-sec/m. If the mass is moved 13 velocity of 2 m/sec, determine the equation of motion of the mass and give its damping factor, quasiperiod, and quasifrequency. What is the equation of motion? y(t) = (Type an exact answer, using radicals as needed.) The damping factor is