Which of the points (s, t) is not one of the vertices of the shaded region of the
set of inequalities shown below?
OA. (0, 13.33)
OB. (25,5)
O C. (12,0)
OD. (0,30)
s≤ 40-3t
s2 12-t
s≤ 30-t
$20
t20