Use a Graphing Utility to Find the Inverse of the Matrix

Multiple Choice

Use a graphing utility to find the inverse of the matrix, if it exists. Round answers to two decimal places, if necessary.
- $$\left[ \begin{array} { r r r r } 1 & - 4 & 0 & 0 \\0 & 1 & - 2 & 0 \\0 & 0 & 1 & - 1 \\0 & 0 & 0 & 1\end{array} \right]$$

A) $\left[ \begin{array} { r r r r } 1 & 1 & - 2 & 8 \\ 0 & 1 & 2 & - 8 \\ 0 & 0 & 1 & 4 \\ 0 & 0 & 0 & 1 \end{array} \right]$
B) $\left[ \begin{array} { l l l l } 1 & 0 & 0 & 0 \\ 4 & 1 & 0 & 0 \\ 8 & 2 & 1 & 0 \\ 4 & 2 & 1 & 1 \end{array} \right]$
C) $\left[ \begin{array} { r r r r } 1 & 0 & 0 & 0 \\ 1 & 1 & 0 & 0 \\ - 2 & 2 & 1 & 0 \\ 8 & - 8 & 4 & 1 \end{array} \right]$
D) $\left[ \begin{array} { l l l l } 1 & 4 & 8 & 8 \\ 0 & 1 & 2 & 2 \\ 0 & 0 & 1 & 1 \\ 0 & 0 & 0 & 1 \end{array} \right]$