Characteristic polynomial
$$\begin{equation}\left(\lambda + 3\right)^{3} \left(\lambda + 4\right) \left(\lambda^{3} + 7 \lambda^{2} - 2 \lambda - 67\right)^{2} \left(\lambda^{7} - 7 \lambda^{6} - 73 \lambda^{5} - 251 \lambda^{4} - 516 \lambda^{3} - 6646 \lambda^{2} - 9371 \lambda + 3763\right)\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\left(\lambda + 3\right)^{2} \left(\lambda + 4\right) \left(\lambda^{3} + 7 \lambda^{2} - 2 \lambda - 67\right) \left(\lambda^{7} - 7 \lambda^{6} - 73 \lambda^{5} - 251 \lambda^{4} - 516 \lambda^{3} - 6646 \lambda^{2} - 9371 \lambda + 3763\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 4 & 4 & 4 & 8 & 6 & 6 & 12 & 6 & 12 & 9 & 9 & 16 & 16 & 16 & 16 & 30 \\ 1 & -1 & 1 & 0 & 1 & 2 & 4 & 6 & 0 & 2 & 2 & 2 & 6 & 6 & 6 & 3 & 8 \\ 1 & 1 & -1 & 0 & 1 & 2 & 0 & 2 & 4 & 6 & 2 & 2 & 6 & 6 & 3 & 6 & 8 \\ 1 & 0 & 0 & -1 & 2 & 0 & 4 & 4 & 4 & 4 & 4 & 0 & 6 & 12 & 6 & 6 & 0 \\ 1 & 1 & 1 & 1 & -1 & 2 & 0 & 2 & 0 & 2 & 2 & 2 & 0 & 0 & 3 & 3 & 8 \\ 0 & 1 & 1 & 0 & 0 & -2 & 0 & 1 & 0 & 1 & 0 & 0 & 4 & 4 & 2 & 2 & 3 \\ 0 & 1 & 0 & 1 & 0 & 0 & -2 & 2 & 1 & 0 & 1 & 0 & 2 & 4 & 2 & 2 & 0 \\ 0 & 1 & 0 & 0 & 1 & 1 & 1 & -2 & 0 & 1 & 0 & 0 & 0 & 0 & 2 & 0 & 3 \\ 0 & 0 & 1 & 1 & 0 & 0 & 1 & 0 & -2 & 2 & 1 & 0 & 2 & 4 & 2 & 2 & 0 \\ 0 & 0 & 1 & 0 & 1 & 1 & 0 & 1 & 1 & -2 & 0 & 0 & 0 & 0 & 0 & 2 & 3 \\ 0 & 0 & 0 & 1 & 3 & 0 & 1 & 2 & 1 & 2 & -1 & 1 & 2 & 4 & 2 & 2 & 0 \\ 0 & 0 & 0 & 2 & 1 & 0 & 1 & 0 & 1 & 0 & 1 & -1 & 2 & 0 & 2 & 2 & 6 \\ 0 & 0 & 0 & 0 & 0 & 1 & 3 & 1 & 3 & 1 & 0 & 2 & -1 & 2 & 2 & 2 & 4 \\ 0 & 0 & 0 & 0 & 0 & 1 & -2 & 0 & -2 & 0 & -2 & -3 & -1 & -3 & -2 & -2 & -4 \\ 0 & 0 & 0 & 0 & 0 & 0 & 3 & 4 & 0 & 0 & 3 & 2 & 2 & 2 & 0 & 2 & 4 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 3 & 4 & 3 & 2 & 2 & 2 & 2 & 0 & 4 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 3 & 4 & 3 & 3 & 0\end{pmatrix}\notag\end{equation}$$