Consider Paulina Jordan's following linear programming formulation:

Minimize

$$1x_1+$$$2x_2$

$1x_1+3x_{2}90,(C_1)$

$8x_1+2x_{2}160,(C_2)$

$3x_1+2x_{2}120,(C_3)$

$1x_{2}70,(C_4)$

$x_1,x_{2}0$

a$)$ On the graph on right, constraints $C_1,C_2,C_3,$ and $C_4$ have been plotted.

Using the point drawing tool, plot all the corner points for the feasible area.