5. A free vibration test is run to determine the stiffness and damping properties of an elastic element. A 20-kg block is attached to the element. The block is displaced 1 cm and released. The resulting oscillations are monitored with the results shown in the following figure. Determine k and c for the element. 0.01 0.008 0.006 0.004 0.002 புரியாயா -0.002 -0.004 -0.006 -0.008 -0.01 0 0.06 0.12 0.18 0.24 0.30 0.36