Which of the points is not one of the vertices (s, t) of the shaded region of the
set of inequalities shown below?
O A. (15,0)
OB. (7.5,0)
OC. (22.5, 2.5)
OD. (7.5., 7.5)
s≤30-3t
$215-t
$≤25-t
s20