after solving, pls explain why u got the answer really need an explanation thank u so much pls explain in sentences. will rate

6.5. A mass-spring system oscillates freely with a period of 2.6 seconds. After a viscous damper is attached, the resulting mass - spring damper system is observed to oscillate with a period of 3.0 seconds. Determine the damping factor for the system. The mass-spring-damper system is displaced and released from rest. Using the plot of the response of the system, estimate the damping factor from the measured response. 0.2 -0.3 -0. 10