5. Define a relation \( S \) from \( \mathbf{R} \) to \( \mathbf{R} \) as follows:
For all \( (x, y) \in R \times R \),
\( (x, y) \in S \) means that \( x \geq y \).
a. Is \( (2,1) \in S \) ? Is \( (2,2) \in S \) ? Is \( 2 S 3 \) ? Is \( (-1) S(-2) \) ?
b. Draw the graph of \( S \) in the Cartesian plane.