Characteristic polynomial
$$\begin{equation}\lambda \left(\lambda + 1\right)^{2} \left(\lambda^{2} + 2 \lambda + 5\right) \left(\lambda^{4} + 2 \lambda^{3} - 59 \lambda^{2} - 592 \lambda - 800\right) \left(\lambda^{4} + 10 \lambda^{3} + 57 \lambda^{2} + 128 \lambda + 736\right)\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\lambda \left(\lambda + 1\right) \left(\lambda^{2} + 2 \lambda + 5\right) \left(\lambda^{4} + 2 \lambda^{3} - 59 \lambda^{2} - 592 \lambda - 800\right) \left(\lambda^{4} + 10 \lambda^{3} + 57 \lambda^{2} + 128 \lambda + 736\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 4 & 4 & 0 & 12 & 12 & 12 & 12 & 6 & 8 & 16 & 8 & 20 \\ 1 & -1 & 2 & 0 & 0 & 0 & 4 & 0 & 0 & 6 & 12 & -6 & 0 \\ 1 & 1 & -2 & 1 & 2 & 4 & -4 & 4 & 2 & 6 & 12 & 24 & 8 \\ 1 & 1 & 0 & -1 & 2 & 8 & 4 & 4 & -2 & 0 & 0 & 0 & 0 \\ 0 & 1 & 0 & 1 & -2 & 0 & 2 & 2 & -1 & 0 & 0 & -4 & 0 \\ 0 & 2 & 1 & 0 & 1 & -1 & 0 & 2 & 1 & 0 & 0 & 4 & 6 \\ 0 & 0 & 1 & 1 & 1 & 1 & -3 & -2 & 0 & -2 & 2 & 8 & 0 \\ 0 & 0 & 1 & 0 & 0 & 1 & 1 & -2 & 0 & 2 & 2 & -4 & 0 \\ 0 & 0 & 0 & 1 & 1 & 0 & 0 & 0 & 0 & 4 & 8 & 4 & 0 \\ 0 & 0 & 0 & 0 & 1 & -4 & 1 & -2 & 2 & -2 & -1 & 0 & 4 \\ 0 & 0 & 0 & 0 & 2 & 5 & 1 & 2 & 0 & 1 & 0 & 2 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 1 & 2 & 0 & 0 & 1 & -2 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 2 & 5 & 4 & 0\end{pmatrix}\notag\end{equation}$$