Case B O Case E O Gase A O Case F O CaseC O Case D O None QUESTION 9 Free body diagrams for a dynamic model of a two floor shear structure type building are shown below for the masses m and m2 which represent the floors of the building. Explain how the equations of motion of the system for lateral motion are derived and put them into the matrix form (show derivations steps). Write down mass and stiffness matrices. You can either use Maths Editor or instead use prime to for time derivatives, Le. displacement z, velocity z' and acceleration z" and" to specify low index, ie. write zn as z_n. Matrix [A]= a b can be presented as (A-ta. b: c. d if Maths Editor is not used. c d k,(x -x,)! m, k (x-x,) k(x -x) k,(x- x,) Click Save and Submit to se and submit. Clck Save All A TE e ll a re N hp