If A=(0100)A = \begin{pmatrix} 0 & 1 \\ 0 & 0 \end{pmatrix}A=(0010), what is its null space?
The span of (10)\begin{pmatrix} 1 \\ 0 \end{pmatrix}(10)
The span of (01)\begin{pmatrix} 0 \\ 1 \end{pmatrix}(01)
The zero vector only
All vectors in R2\mathbb{R}^2R2