Characteristic polynomial
$$\begin{equation}\left(\lambda + 3\right) \left(\lambda^{2} + 6 \lambda + 13\right) \left(\lambda^{4} + 9 \lambda^{3} + 38 \lambda^{2} + 112 \lambda + 171\right)^{2} \left(\lambda^{7} - 8 \lambda^{6} - 42 \lambda^{5} - 244 \lambda^{4} + 813 \lambda^{3} + 7492 \lambda^{2} + 14268 \lambda + 6728\right)\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\left(\lambda + 3\right) \left(\lambda^{2} + 6 \lambda + 13\right) \left(\lambda^{4} + 9 \lambda^{3} + 38 \lambda^{2} + 112 \lambda + 171\right) \left(\lambda^{7} - 8 \lambda^{6} - 42 \lambda^{5} - 244 \lambda^{4} + 813 \lambda^{3} + 7492 \lambda^{2} + 14268 \lambda + 6728\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 0 & 4 & 4 & 4 & 3 & 3 & 6 & 12 & 15 & 9 & 15 & 12 & 16 & 16 & 8 & 40 & 40 \\ 1 & -1 & 0 & 0 & 0 & 4 & 4 & 4 & 0 & 2 & 2 & 2 & 4 & 12 & 12 & 6 & 12 & 24 \\ 1 & 0 & -1 & 1 & 1 & 0 & 0 & 2 & 2 & 2 & 0 & 4 & 4 & 3 & 3 & 0 & 9 & 8 \\ 1 & 0 & 1 & -1 & 1 & 0 & 0 & 2 & 2 & 4 & 2 & 2 & 4 & 3 & 6 & 3 & 9 & 8 \\ 1 & 1 & 1 & 1 & -1 & 0 & 0 & -2 & 4 & 2 & 2 & 2 & -2 & 0 & 0 & 0 & 6 & 8 \\ 0 & 1 & 1 & 0 & 0 & -2 & 1 & 1 & 0 & 0 & 0 & 0 & 1 & 2 & 2 & 0 & 2 & 6 \\ 0 & 1 & 0 & 1 & 0 & 1 & -2 & 1 & 0 & 0 & 0 & 0 & 1 & 2 & 4 & 2 & 2 & 6 \\ 0 & 1 & 0 & 0 & 1 & 1 & 1 & -2 & 0 & 0 & 0 & 0 & -1 & 4 & 2 & 2 & 0 & 6 \\ 0 & 0 & 1 & 1 & 0 & 0 & 0 & 0 & -2 & 1 & 0 & 1 & 1 & 0 & 2 & 0 & 0 & 0 \\ 0 & 0 & 1 & -1 & 1 & 1 & 0 & 0 & 0 & -2 & -1 & 0 & -1 & 0 & -2 & 0 & -4 & -6 \\ 0 & 0 & 1 & 1 & 0 & 0 & 0 & 0 & 2 & 1 & 0 & 1 & 1 & 0 & 2 & 0 & 8 & 12 \\ 0 & 0 & 0 & 2 & 1 & 0 & 1 & 0 & 2 & 1 & 1 & -1 & 0 & 0 & 0 & 0 & 4 & 6 \\ 0 & 0 & 0 & 0 & 1 & 0 & 0 & 1 & 0 & 1 & 1 & 1 & 0 & 0 & 0 & 0 & 4 & 0 \\ 0 & 0 & 0 & 0 & 0 & 1 & 3 & 1 & 1 & -1 & -1 & 2 & 0 & -1 & \frac{3}{2} & \frac{1}{2} & 0 & 4 \\ 0 & 0 & 0 & 0 & 0 & 1 & 1 & 3 & 0 & 2 & 0 & 2 & 4 & 2 & 0 & 1 & 2 & 4 \\ 0 & 0 & 0 & 0 & 0 & 1 & -3 & -3 & 0 & 1 & 3 & -5 & -4 & -2 & -2 & -3 & -2 & -4 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 2 & 2 & 1 & 2 & 1 & 1 & \frac{1}{2} & \frac{1}{2} & 0 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 2 & 2 & 1 & 3 & 0\end{pmatrix}\notag\end{equation}$$