Characteristic polynomial
$$\begin{equation}\lambda^{2} \left(\lambda + 1\right) \left(\lambda^{2} + 2 \lambda + 5\right) \left(\lambda^{8} + 4 \lambda^{7} - 54 \lambda^{6} - 436 \lambda^{5} - 1043 \lambda^{4} + 4128 \lambda^{3} + 20536 \lambda^{2} - 9984 \lambda + 283856\right)\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\lambda \left(\lambda + 1\right) \left(\lambda^{2} + 2 \lambda + 5\right) \left(\lambda^{8} + 4 \lambda^{7} - 54 \lambda^{6} - 436 \lambda^{5} - 1043 \lambda^{4} + 4128 \lambda^{3} + 20536 \lambda^{2} - 9984 \lambda + 283856\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 0 & 0 & 4 & 0 & 0 & 6 & 3 & 3 & 8 & 4 & 4 & 0 \\ 1 & -1 & 0 & 0 & 0 & 4 & 0 & 0 & 0 & 6 & 3 & 3 & 0 \\ 1 & 1 & -1 & 0 & -2 & 0 & 4 & 2 & 2 & 0 & 0 & 0 & 0 \\ 2 & 0 & 1 & 0 & 2 & 0 & 0 & 2 & 2 & 0 & 0 & 3 & 4 \\ 0 & 1 & 2 & 0 & -1 & 0 & 0 & 0 & 0 & 4 & 2 & 2 & 0 \\ 0 & 2 & 0 & 1 & 1 & -1 & 0 & 0 & 0 & 0 & 2 & 0 & 3 \\ 0 & 0 & 2 & 1 & 0 & 1 & -1 & 0 & 0 & -2 & 0 & 2 & 0 \\ 0 & 0 & 0 & 2 & 0 & 0 & 1 & 0 & 0 & 2 & 0 & 0 & 0 \\ 0 & 0 & 0 & 2 & 0 & 0 & 1 & 0 & 0 & 2 & 0 & 0 & 0 \\ 0 & 0 & 0 & 0 & 2 & 1 & 2 & 0 & 0 & -1 & 0 & 0 & 2 \\ 0 & 0 & 0 & 0 & 0 & 4 & 0 & 1 & 1 & 2 & -1 & 0 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 4 & 3 & 3 & 0 & 1 & 0 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 4 & 3 & 4 & 0\end{pmatrix}\notag\end{equation}$$