Let A = [0, -2; 2, 0]. If M and N are two matrices given by M =Σ_k =1^10 A^2 k and N =Σ_k =1^10 A^2 k -1 then MN^2 is:

Let $\displaystyle \mathrm{A}=\left[\begin{array}{rr}0 & -2 \\ 2 & 0\end{array}\right]$. If M and N are two matrices given by $\displaystyle \mathrm{M}=\sum_{\mathrm{k}=1}^{10} \mathrm{~A}^{2 \mathrm{k}}$ and $\displaystyle \mathrm{N}=\sum_{\mathrm{k}=1}^{10} \mathrm{~A}^{2 \mathrm{k}-1}$ then $\displaystyle \mathrm{MN}^2$ is :