Which of these points does NOT lie in the region $x + y \le 5$, $x - y \ge -1$, $x \ge 0$, $y \ge 0$?

Explanation

1. 01

   At $(1, 3)$: $x - y = -2$, which is less than $-1$, so it breaks the second constraint.

2. 02

   Each of the other three satisfies all four constraints.