- Let W=\operatorname{span}\left\{\left(\begin{array}{cc}

1 & -2 \\

0 & 5

\end{array}\right),\left(\begin{array}{ll}

2 & 3 \\

0 & 7

\end{array}\right),\left(\begin{array}{cc}

6 & -3 \\

0 & 9

\end{array}\right),\left(\begin{array}{cc}

-1 & 1 \\

0 & 2

\end{array}\right)\right\} Which statement below is INCORRECT?