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Assume that this structure is excited by a shaker placed at the roof level. As the design engineer of consulting firm, you are asked to write the equations of motion for the structure, propose reasonable values for the parameters of the equation of the motion, and suggest an instrumentation and test procedure for further calibrating the parameters using the test results, As Phase 1 deliverables, please do the following 9. Repeat the previous problem by assuming 5% damping ratio for all of modes Plot the displacement, velocity, and acceleration at 3rd and 6 floors In doing so, consider the cases in which load frequency is a Half of the first vibration frequency (S1). b. Exactly equal to the first vibration frequency ($1), C 1% more than the first vibration frequency ($1). d. Compare the responses you plot with the ones in Deliverable 8 ($2). Lo (Ctrl