Graph the system of inequalities and list each corner point. $$\left\{ \begin{array}{r@{}r@{}r} x + y & \ge & 1 \\ x+ 2 y & \le & 4 \\ 2 x+ y & \le & 4 \\ x & \ge & 0 \\ y & \ge & 0 \\ \end{array} \right.$$
Corner Points:
If there is more than one corner point, type the points separated by a comma i.e.: (1,2),(3,4).