Characteristic polynomial
$$\begin{equation}\left(\lambda + 3\right) \left(\lambda - 8\right) \left(\lambda^{2} + 6 \lambda + 13\right)^{2} \left(\lambda^{3} - 15 \lambda^{2} + 14 \lambda - 164\right) \left(\lambda^{4} + 13 \lambda^{3} + 71 \lambda^{2} + 219 \lambda + 331\right)^{2}\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\left(\lambda + 3\right) \left(\lambda - 8\right) \left(\lambda^{2} + 6 \lambda + 13\right) \left(\lambda^{3} - 15 \lambda^{2} + 14 \lambda - 164\right) \left(\lambda^{4} + 13 \lambda^{3} + 71 \lambda^{2} + 219 \lambda + 331\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 0 & 8 & 8 & 4 & 3 & 3 & 6 & 30 & 21 & 18 & 21 & 24 & 24 & 12 & 80 & 80 \\ 1 & -1 & 0 & 0 & 0 & 8 & 8 & 4 & 0 & 2 & 2 & 2 & 30 & 18 & 15 & 18 & 56 \\ 1 & 0 & -1 & 2 & 1 & 0 & 0 & 2 & 6 & 2 & 2 & 4 & 3 & 3 & 0 & 15 & 16 \\ 1 & 0 & 2 & -1 & 1 & 0 & 0 & 2 & 6 & 4 & 4 & 2 & 3 & 6 & 3 & 15 & 16 \\ 1 & 1 & 1 & 1 & -1 & 0 & 0 & -2 & 8 & 6 & 4 & 6 & 0 & 0 & 0 & 18 & 8 \\ 0 & 1 & 1 & 0 & 0 & -2 & 2 & 1 & 0 & 0 & 0 & 0 & 6 & 2 & 2 & 2 & 12 \\ 0 & 1 & 0 & 1 & 0 & 2 & -2 & 1 & 0 & 0 & 0 & 0 & 6 & 4 & 4 & 2 & 12 \\ 0 & 1 & 0 & 0 & 2 & 1 & 1 & -1 & 0 & 1 & 1 & 1 & 8 & 6 & 4 & 8 & 18 \\ 0 & 0 & 1 & 1 & 0 & 0 & 0 & 0 & -2 & 1 & 0 & 1 & 0 & 2 & 0 & 0 & 0 \\ 0 & 0 & 1 & -1 & 1 & 1 & 0 & 0 & -1 & -2 & -1 & 1 & 0 & -2 & 0 & 0 & -6 \\ 0 & 0 & 1 & 1 & 0 & 0 & 0 & 0 & 4 & 1 & 0 & 1 & 0 & 2 & 0 & 8 & 12 \\ 0 & 0 & 0 & 2 & 1 & 0 & 1 & 0 & 3 & 2 & 2 & -1 & 0 & 0 & 0 & 8 & 6 \\ 0 & 0 & 0 & 0 & 0 & 1 & 3 & 1 & 1 & -\frac{1}{2} & -1 & \frac{5}{2} & 0 & 3 & \frac{3}{2} & 1 & 8 \\ 0 & 0 & 0 & 0 & 0 & 1 & 1 & 2 & 0 & 2 & 0 & 2 & 2 & 0 & 1 & 2 & 8 \\ 0 & 0 & 0 & 0 & 0 & 1 & -3 & -2 & 0 & 1 & 3 & -5 & -2 & -3 & -4 & -2 & -8 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 2 & \frac{3}{2} & 1 & \frac{3}{2} & 1 & 0 & \frac{1}{2} & 0 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 2 & \frac{3}{2} & 1 & 3 & 0\end{pmatrix}\notag\end{equation}$$