Characteristic polynomial
$$\begin{equation}\left(\lambda + 2\right) \left(\lambda^{3} + 6 \lambda^{2} + 12 \lambda - 100\right) \left(\lambda^{3} - 2 \lambda^{2} - 76 \lambda - 212\right) \left(\lambda^{5} + 6 \lambda^{4} + 13 \lambda^{3} + 43 \lambda^{2} + 162 \lambda + 164\right)^{2}\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\left(\lambda + 2\right) \left(\lambda^{3} + 6 \lambda^{2} + 12 \lambda - 100\right) \left(\lambda^{3} - 2 \lambda^{2} - 76 \lambda - 212\right) \left(\lambda^{5} + 6 \lambda^{4} + 13 \lambda^{3} + 43 \lambda^{2} + 162 \lambda + 164\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 2 & 2 & 6 & 2 & 3 & 6 & 3 & 6 & 6 & 3 & 6 & 4 & 8 & 4 & 8 & 10 \\ 1 & -1 & 0 & 1 & 0 & 2 & 4 & 2 & 2 & 0 & 0 & 2 & 3 & 6 & 3 & 3 & 4 \\ 1 & 0 & -1 & 1 & 0 & 2 & 2 & 0 & 4 & 2 & 0 & 2 & 3 & 3 & 0 & 0 & 0 \\ 1 & 1 & 1 & -1 & 1 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 3 & 4 \\ 1 & 0 & 0 & 1 & -1 & 0 & 2 & 2 & 2 & 2 & 2 & 4 & 3 & 3 & 3 & 3 & 0 \\ 0 & 1 & 1 & 0 & 0 & -2 & 1 & 0 & 1 & 0 & 0 & 0 & 2 & 2 & 0 & 0 & 0 \\ 0 & 1 & 0 & 1 & 0 & 1 & -2 & 1 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 3 \\ 0 & 1 & 0 & 0 & 1 & 0 & 1 & -2 & 0 & 0 & 0 & 1 & 2 & 2 & 2 & 2 & 0 \\ 0 & 0 & 1 & 2 & 0 & 1 & 1 & 0 & -1 & 1 & 0 & 0 & 0 & 0 & 0 & 0 & 0 \\ 0 & 0 & 1 & 1 & 3 & 0 & 0 & 1 & 1 & -1 & 0 & 1 & 2 & 2 & 0 & 2 & 3 \\ 0 & 0 & 2 & 0 & -2 & 1 & 0 & -1 & 0 & 0 & -1 & 0 & 0 & 0 & 2 & 2 & 0 \\ 0 & 0 & 0 & 2 & 1 & 0 & 1 & 1 & 0 & 1 & 1 & -1 & 0 & 0 & 0 & 0 & 0 \\ 0 & 0 & 0 & 0 & 0 & 1 & 4 & 1 & 3 & -2 & -1 & 3 & -1 & 2 & 1 & 0 & -2 \\ 0 & 0 & 0 & 0 & 0 & 1 & 1 & 3 & 0 & 4 & 1 & 1 & 1 & -1 & 0 & 1 & 4 \\ 0 & 0 & 0 & 0 & 0 & 2 & 0 & -2 & -2 & -4 & 0 & -4 & -1 & -2 & -2 & -1 & -2 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 3 & 4 & 2 & 3 & 1 & 2 & 1 & 0 & 2 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 3 & 4 & 2 & 3 & 0\end{pmatrix}\notag\end{equation}$$