Consider the following spring system.
$c_1 = 2,\quad c_2 = 8,\quad c_3 = 10,\quad c_4 = 6 \\ m_1 = 3,\quad m_2 = 6$

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Write the elongation matrix $A =$$\left[\Rule{0pt}{4.8em}{0pt}\right.$$\left]\Rule{0pt}{4.8em}{0pt}\right.$ (assume down is the positive direction).
Write the spring constant matrix $C =$$\left[\Rule{0pt}{4.8em}{0pt}\right.$$\left]\Rule{0pt}{4.8em}{0pt}\right.$
Write the stiffness matrix $K =$$\left[\Rule{0pt}{2.4em}{0pt}\right.$$\left]\Rule{0pt}{2.4em}{0pt}\right.$

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Find the displacement of the springs at equilibrium caused by gravity $u = g$$\left[\Rule{0pt}{2.4em}{0pt}\right.$$\left]\Rule{0pt}{2.4em}{0pt}\right.$