A(f'',e'')=I(f'',f')\cdot A(f',e')\cdot I(e',e'')=
\\
\\ = \left[\begin{matrix} 1 & 0 & 0 & 0 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 0 & 1 \\ 0 & 0 & 1 & 0 \end{matrix}\right]^{-1} \cdot \left[\begin{matrix} 1 & 1 & 1 & 2 \\ 2 & 0 & 1 & 0 \\ 1 & 1 & 0 & 2 \\ 1 & 1 & 1 & 2 \end{matrix} \right] \cdot \left[ \begin{matrix} 1 & 1 & 1 & 1 \\ 1 & 0 & 1 & 1 \\0 & 0 & 0 & -1 \\ 0 & 1 & 1 & 1 \end{matrix} \right]^{-1}=...