Determine Whether the Matrix Is in Echelon Form, Reduced Echelon $$\left[ \begin{array} { r r r r } 1 & 4 & 5 & - 7 \\0 & 1 & - 4 & - 6 \\0 & 2 & 1 & 6\end{array} \right]$$

Multiple Choice

Determine whether the matrix is in echelon form, reduced echelon form, or neither.
- $$\left[ \begin{array} { r r r r } 1 & 4 & 5 & - 7 \\0 & 1 & - 4 & - 6 \\0 & 2 & 1 & 6\end{array} \right]$$

A) Echelon form
B) Reduced echelon form
C) Neither