engineering mechanics 2- buckling and vibration analysis

There are two questions which i need are about buckling analysis and vibration analysis. Question 1 is about buckling capacities of axially loaded, cold-formed, built-up C-channels, journal of Thin-walled structures. Second question is about vibration control by attaching masses to a plate excited by rotating machinery, journal of sound and vibration. I attached the related documents about these questions. You should make it very clear what sources of information have been used; where material/information from these sources is quoted it must be clearly referenced using the Harvard Referencing System. 1000 words for each questions.