Which one of the options given represents the feasible region of the linear programming model:
$$
\begin{gathered}
\text { Maximize } 45 X_1+60 X_2 \\
X_1 \leq 45 \\
X_2 \leq 50 \\
10 X_1+10 X_2 \geq 600 \\
25 X_1+5 X_2 \leq 750
\end{gathered}
$$
- Region $\mathrm{P}$
- Region $\mathrm{Q}$
- Region $\mathrm{R}$
- Region $\mathrm{S}$