are given by
\left( \begin{matrix} m_1 \\ m_2 \\ m_3 \end{matrix} \right), \quad \left( \begin{matrix} -4w & 2w & 0 \\ 2w & -4w & 2w \\ 0 & 2w & -2w \end{matrix} \right), \quad \left( \begin{matrix} 2w \\ 2w \\ w \end{matrix} \right)with 2m_1 \geq m_2, 2m_2 \geq m_1 + m_3, m_3 \geq m_2.
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