16. Find the g-inverse of the matrix A where

$$

A = \begin{bmatrix}

1 & 1 & 1 & 0 & 0 \\

1 & 1 & 1 & 0 & 0 \\

1 & 1 & 1 & 0 & 0 \\

0 & 0 & 0 & 2 & 2 \\

0 & 0 & 0 & 2 & 2

\end{bmatrix}

$$