Answer
$\begin{bmatrix}
1\\
0
\end{bmatrix}$ is in Col A and $\begin{bmatrix}
-5\\
0\\
1\\
2
\end{bmatrix}$ is in Nul A
Work Step by Step
Any column vector or linear combination of the columns vectors in the matrix A is in Col A
Just by looking at the matrix, we know $\begin{bmatrix}
-5\\
0\\
1\\
2
\end{bmatrix}$ is in Nul A
