max z = 30x1 + 100x2
s.t x1 + x2 <= 7
4x1 + 10x2 <= 40
10x1 >= 30
x1,x2 >= 0
(a) Determine graphically the feasible region (FR) of the LP
(b) Find the coordinates of all extreme (corner) points of the FR.
(c) Solve the LP obtained using graphical method. How many optimal solutions does the LP have?