Characteristic polynomial
$$\begin{equation}\left(\lambda + 1\right)^{3} \left(\lambda - 3\right) \left(\lambda^{2} + 3 \lambda + 9\right) \left(\lambda^{2} + 11 \lambda + 37\right) \left(\lambda^{2} - 9 \lambda - 11\right) \left(\lambda^{3} + 4 \lambda^{2} + 36 \lambda + 101\right)\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\left(\lambda + 1\right) \left(\lambda - 3\right) \left(\lambda^{2} + 3 \lambda + 9\right) \left(\lambda^{2} + 11 \lambda + 37\right) \left(\lambda^{2} - 9 \lambda - 11\right) \left(\lambda^{3} + 4 \lambda^{2} + 36 \lambda + 101\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 2 & 2 & 4 & 9 & 9 & 9 & 9 & 3 & 32 & 16 & 20 & 30 \\ 1 & 0 & 1 & 1 & 2 & 0 & 0 & 6 & 4 & -12 & -6 & -9 & 0 \\ 1 & 0 & -1 & 1 & 2 & 4 & 4 & 2 & 0 & 6 & 3 & 3 & 12 \\ 1 & 0 & 1 & -1 & 0 & 2 & 0 & 0 & 0 & 18 & 9 & 12 & 12 \\ 0 & 1 & 1 & 0 & -1 & 1 & 0 & 1 & 0 & -2 & 0 & -4 & -9 \\ 0 & 1 & 0 & 3 & 1 & -1 & 0 & 3 & 2 & 0 & 0 & 0 & 9 \\ 0 & 1 & 0 & -1 & 1 & 1 & 0 & -1 & -1 & 6 & 4 & 2 & -9 \\ 0 & 0 & 1 & 1 & 0 & 0 & 0 & -2 & 0 & 2 & 0 & 4 & 9 \\ 0 & 0 & 1 & 0 & 0 & 0 & 0 & 1 & -1 & 4 & 2 & 2 & 0 \\ 0 & 0 & 0 & 0 & 7 & -3 & 10 & -5 & -4 & 0 & -4 & 10 & 12 \\ 0 & 0 & 0 & 0 & -6 & 5 & -12 & 11 & 8 & -1 & 4 & -12 & -12 \\ 0 & 0 & 0 & 0 & -3 & 5 & -4 & 4 & 2 & 2 & 4 & -6 & -6 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & \frac{11}{3} & 2 & 2 & 0\end{pmatrix}\notag\end{equation}$$