Find the inverse matrix by i. using the elementary row operation ii. finding the adjoint matrix for the following matrices. (a) $\begin{bmatrix} 5 & 4\\ 6 & 5 \end{bmatrix}$ (c) $\begin{bmatrix} 1 & 1 & 1\\ 0 & 1 & 2\\ 2 & 1 & 1 \end{bmatrix}$ (b) $\begin{bmatrix} 4 & -7\\ -5 & 9 \end{bmatrix}$ (d) $\begin{bmatrix} 1 & 2 & 1\\ 0 & 1 & 0\\ 0 & 3 & -1 \end{bmatrix}$

          Find the inverse matrix by
i.
using the elementary row operation
ii.
finding the adjoint matrix
for the following matrices.
(a) $\begin{bmatrix} 5 & 4\\ 6 & 5 \end{bmatrix}$
(c) $\begin{bmatrix} 1 & 1 & 1\\ 0 & 1 & 2\\ 2 & 1 & 1 \end{bmatrix}$
(b) $\begin{bmatrix} 4 & -7\\ -5 & 9 \end{bmatrix}$
(d) $\begin{bmatrix} 1 & 2 & 1\\ 0 & 1 & 0\\ 0 & 3 & -1 \end{bmatrix}$