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

\(\left[\begin{array}{rrr|r}2 & -2 & 4 & 22 \\
0 & 0 & -3 & -12 \\
2 & 0 & 2 & 18\end{array}\right]\begin{array}{ll}\phantom{1} & \frac{1}{2}R_1 \to R_1 \\
\phantom{1} & \\
\phantom{1} & \end{array}\)