Characteristic polynomial
$$\begin{equation}\left(\lambda - 3\right) \left(\lambda^{2} + 2 \lambda + 5\right) \left(\lambda^{2} + 3 \lambda + 9\right) \left(\lambda^{8} + 10 \lambda^{7} - 19 \lambda^{6} - 502 \lambda^{5} - 2276 \lambda^{4} - 9526 \lambda^{3} - 54231 \lambda^{2} - 224846 \lambda - 394643\right)\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\left(\lambda - 3\right) \left(\lambda^{2} + 2 \lambda + 5\right) \left(\lambda^{2} + 3 \lambda + 9\right) \left(\lambda^{8} + 10 \lambda^{7} - 19 \lambda^{6} - 502 \lambda^{5} - 2276 \lambda^{4} - 9526 \lambda^{3} - 54231 \lambda^{2} - 224846 \lambda - 394643\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 0 & 4 & 4 & 3 & 0 & 3 & 0 & 0 & 8 & 0 & 8 & 0 \\ 2 & 0 & 1 & 0 & 4 & 4 & -2 & 4 & 0 & 0 & 0 & 0 & 0 \\ 1 & 0 & -1 & 2 & 0 & 0 & 2 & 0 & -4 & 0 & 0 & 0 & 0 \\ 1 & 0 & 1 & -2 & 0 & 0 & 0 & 4 & 8 & 3 & 0 & 3 & 8 \\ 0 & 1 & 3 & 0 & -1 & 2 & 0 & 2 & 0 & 0 & -4 & 0 & 0 \\ 0 & 1 & -1 & 2 & 1 & -2 & 0 & -1 & 0 & 4 & 8 & -2 & 0 \\ 0 & 2 & 0 & 0 & 1 & 0 & 0 & 0 & 0 & 4 & 0 & 4 & 0 \\ 0 & 0 & 2 & 1 & 0 & 0 & 0 & -1 & 2 & 0 & 0 & 2 & 0 \\ 0 & 0 & 0 & 1 & 0 & 0 & 0 & 1 & -2 & 0 & 0 & 0 & 3 \\ 0 & 0 & 0 & 0 & 2 & 1 & 0 & 3 & 0 & -1 & 2 & 0 & 0 \\ 0 & 0 & 0 & 0 & 0 & 1 & 0 & 1 & 3 & 1 & -2 & 0 & 0 \\ 0 & 0 & 0 & 0 & 2 & 2 & 2 & 0 & 0 & 1 & 0 & 0 & 4 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 4 & 3 & 2 & 0\end{pmatrix}\notag\end{equation}$$