here is a link to the problem for 3.28 https://www.chegg.com/homework-help/Engineering-Vibration-3rd-edition-chapter-3-problem-28P-solution-9780132281737

can any hand work please be shown , thank you.

Use Matlab to plot the response (steady-state displacement and velocity) of a single DOF mass/spring/damper system subjected to a force defined by the first few non-zero terms of the Fourier Series expansion of problem 3.28. Assume mass m 2kg, damping coefficient c 10 kg/s, stiffness k 200 N/m. How many Fourier series terms are needed to get a reasonable plot of the output quantities? Hint: look at the solution for problem 3.28 to see what the Fourier coefficients look like. Then, within the Matlab "for" loop, insert an expression that evaluates x(t) and v(t) for the current Fourier series term, and adds to a running sum of response terms