A company manufactures a portable speakers which sell for $r and y smartphones which sell for $s. The weekly demand and cost equations are as follows: r= -6x+2y+ 268 s =3x -8y + 372 C(x, y) = 140 x + 180 y + 220 How many of each product should the company produce to maximize their profit? O a) 18 portable speakers and 18 smartphones O b) 24 portable speakers and 12 smartphones O c) 16 portable speakers and 14 smartphones O d) 22 portable speakers and 12 smartphones