No such $A$ exists

$A=\begin{pmatrix}1&1&1\\1&1&1\\1&1&1\end{pmatrix}$

$A=\begin{pmatrix}0&0&1\\0&1&0\\1&0&0\end{pmatrix}$

$A$ exists but is different from the matrices given in parts (B) and (C)