Characteristic polynomial
$$\begin{equation}\left(\lambda + 3\right) \left(\lambda^{4} + 9 \lambda^{3} + 22 \lambda^{2} - 24 \lambda - 91\right)^{2} \left(\lambda^{4} - 3 \lambda^{3} + 30 \lambda^{2} - 116 \lambda - 123\right) \left(\lambda^{4} - 3 \lambda^{3} - 50 \lambda^{2} - 156 \lambda - 171\right)\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\left(\lambda + 3\right) \left(\lambda^{4} + 9 \lambda^{3} + 22 \lambda^{2} - 24 \lambda - 91\right) \left(\lambda^{4} - 3 \lambda^{3} + 30 \lambda^{2} - 116 \lambda - 123\right) \left(\lambda^{4} - 3 \lambda^{3} - 50 \lambda^{2} - 156 \lambda - 171\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 0 & 2 & 4 & 2 & 0 & 3 & 3 & 3 & 3 & 3 & 12 & 4 & 4 & 4 & 8 & 10 \\ 1 & -1 & 0 & 0 & 0 & 2 & 4 & 2 & 0 & 0 & 0 & 2 & 3 & 3 & 3 & 0 & 8 \\ 1 & 0 & -1 & 1 & 0 & 0 & 0 & 0 & 2 & 2 & 0 & 2 & 3 & 3 & 0 & 3 & 4 \\ 1 & 0 & 1 & -1 & 0 & 0 & 0 & 0 & 0 & 0 & 2 & 4 & 0 & 0 & 3 & 3 & 4 \\ 1 & 1 & 0 & 2 & 0 & 0 & 0 & 0 & 4 & 2 & 0 & -2 & 0 & 0 & -3 & -3 & -4 \\ 0 & 1 & 1 & 0 & 0 & -2 & 1 & 0 & 0 & 0 & 0 & 0 & 2 & 2 & 0 & 0 & 3 \\ 0 & 1 & 0 & 1 & 0 & 1 & -2 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 2 & 0 & 3 \\ 0 & 1 & 0 & 0 & 1 & 0 & 2 & -1 & 0 & 0 & 0 & 0 & 4 & 2 & 0 & 0 & -3 \\ 0 & 0 & 1 & 1 & 0 & 0 & 0 & 0 & -2 & 0 & 0 & 0 & 0 & 0 & 0 & 2 & 3 \\ 0 & 0 & 1 & 0 & 1 & 1 & 0 & 0 & 2 & -1 & 1 & 1 & 0 & 0 & 0 & -2 & -3 \\ 0 & 0 & 0 & 1 & -1 & 0 & 0 & -1 & 1 & 0 & -2 & -2 & 0 & 0 & 0 & -2 & 0 \\ 0 & 0 & 0 & 2 & 2 & 0 & 1 & 1 & 1 & 1 & 1 & 1 & 0 & 0 & 0 & 2 & 0 \\ 0 & 0 & 0 & 0 & 0 & 1 & -3 & -4 & -1 & -2 & -2 & -10 & -6 & -3 & -3 & -2 & -2 \\ 0 & 0 & 0 & 0 & 0 & 1 & 6 & 7 & 4 & 5 & 2 & 14 & 7 & 3 & 5 & 3 & 4 \\ 0 & 0 & 0 & 0 & 0 & 0 & 5 & 3 & 0 & 0 & 3 & 7 & 3 & 2 & 0 & 1 & 2 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 5 & 3 & 3 & 5 & 2 & 1 & 1 & 0 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 5 & 3 & 3 & 3 & 0\end{pmatrix}\notag\end{equation}$$