Shaded region is represented by

$2x + 5y ≥ 80, x + y ≤ 20, x ≥ 0, y ≤ 0$

$2 x+5 y \geq 80, x+y \geq 20, x \geq 0, y \geq 0$

$2 x+5 y \leq 80, x+y \leq 20, x \geq 0, y \geq 0$

$2 x+5 y \leq 80, x+y \leq 20, x \leq 0, y \leq 0$