Find the Inverse of the Matrix $\left[ \begin{array} { c c } - 8 & 14 \\- 4 & 7\end{array} \right]$

Multiple Choice

Find the inverse of the matrix $\left[ \begin{array} { c c } - 8 & 14 \\- 4 & 7\end{array} \right]$ (if it exists) .

A) $\frac { 1 } { 4 } \left[ \begin{array} { l l } 7 & - 14 \\4 & - 8\end{array} \right]$
B) $- \frac { 1 } { 8 } \left[ \begin{array} { c c } 7 & - 14 \\4 & - 8\end{array} \right]$
C) $- \frac { 1 } { 4 } \left[ \begin{array} { c c } - 7 & - 14 \\4 & 8\end{array} \right]$
D) $\frac { 1 } { 7 } \left[ \begin{array} { c c } - 8 & 14 \\- 4 & 7\end{array} \right]$
E) does not exist