Find a basis for the span of the vectors

\[ \begin{bmatrix} 4 \\ 0 \\ 4 \end{bmatrix} \qquad \begin{bmatrix} 3 \\ 3 \\ -2 \end{bmatrix} \qquad \begin{bmatrix} 4 \\ 1 \\ -2 \end{bmatrix} \qquad \begin{bmatrix} 11 \\ -5 \\ 2 \end{bmatrix} \qquad .\]

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