16x + 8y <= 80 8x + 16y <= 80 8x + 8y <= 48 x >= 0, y >= 0 Find the coordinates of all corner points (if any). (Order your answers from smallest to largest x, then from smallest to largest y. If an answer does not exist, enter DNE.) (x, y)= (x, y)= (x, y)= (x, y)= (x, y)=