1. The problem statement, all variables and given/known data See attached link 3. The attempt at a solution I would have write my work out here, but I have not managed to display matrices next to each other yet. My problem is putting it into matrix form. The form I have is shown in the below attachement. The matrix I get for A, (at the bottom of the attachment) does not allow me to correctly compute the normal modes later, so I have made an error somewhere (besides the numbers look messy and there does not seem to be any motivation for taking g/2a outside the matrix given my work). The a',b,c,d... etc at the top of the attachment just allowed me to determine the matrix elements more easily. Many thanks.