6 The matrix \(\mathbf { A }\) is given by
$$\mathbf { A } = \left[ \begin{array} { c c }
5 & 2
- 3 & 4
\end{array} \right]$$
6
- \(\quad\) Find \(\operatorname { det } \mathbf { A }\)
6 - Find \(\mathbf { A } ^ { - 1 }\)
6 - Given that \(\mathbf { A B } = \left[ \begin{array} { c c } 9 & 6
5 & 12 \end{array} \right]\) and \(\mathbf { M } = 2 \mathbf { A } + \mathbf { B }\) find the matrix \(\mathbf { M }\)