For the matrix $A$ below find a set of vectors $T$ meeting the following requirements: (1) the span of $T$ is the column space of $A$, that is, $\spn{T}=\csp{A}$, (2) $T$ is linearly independent, and (3) the elements of $T$ are columns of $A$. \begin{equation*} A= \begin{bmatrix} 2 & 1 & 4 & -1 & 2 \\ 1 & -1 & 5 & 1 & 1 \\ -1 & 2 & -7 & 0 & 1 \\ 2 & -1 & 8 & -1 & 2 \end{bmatrix} \end{equation*}