Please check any redrawn figures carefully, making sure that all graphics and text that should be present in the figures are accurately represented.
The sense of the sentence ‘Note that for the special case …’ is unclear, please rewrite.
the systems would have both the non-decaying transient and steady state amplitudes, thus, the steady-state amplitude is impossible to reach regardless of time allowed to run for, therefore we used the theoretical steady state as stored maximum amplitudes values.
Please check the details for any journal references that do not have a link as they may contain some incorrect information.
Please provide conference date for references [10, 12.]
date for  is 11th-13th September 2013 http://mptl18.dia.uned.es/mptl18/program.html
date for  is 04th- 06th July 2011 http://www.nithep.ac.za/3au.htm
Additional changes suggested:
ages 18–19 should be ages 17–18
Page 3 text below equation (3) ending with
natural frequencyfo. should be natural frequency fo.
K12 should be K-12