### Perform the indicated operation(s) on the matrix.

\(\left[\begin{array}{rrr|r}-2 & -4 & -4 & -30 \\
1 & -2 & 1 & 2 \\
-4 & 4 & 0 & 4\end{array}\right]\begin{array}{ll}\phantom{1} & -\frac{1}{2}R_1 \to R_1 \\
\phantom{1} & \\
\phantom{1} & \end{array}\)