1.
$$\mathbf { R } = \left( \begin{array} { l l }
0 & 1
1 & 0
\end{array} \right) \text { and } \mathbf { S } = \left( \begin{array} { r r }
0 & - 1
- 1 & 0
\end{array} \right)$$
- Find \(\mathbf { R } ^ { 2 }\).
- Find \(\mathbf { R S }\).
- Describe the geometrical transformation represented by \(\mathbf { R S }\).