1. 1. Consider the following four LP formulations. Using a graphical approach, determine which of the formulation is
2. unbounded?
3. infeasible solution.
4. feasible

Formulation 1	Formulation 2	Formulation 3
Max 10 X1+10 X2 SUBJECT TO: 2 X1<= 10 2 X1 + 4 X2 <=16 4 X2 <= 8 X1 = 6	Max 3 X1+2 X2 SUBJECT TO: X1 + X2 >=5 4 X1 >= 8 2 X2 >= 4	Max 3X1+3 X2 SUBJECT TO: 2 X1+ 6 X2 <= 48 4 X1 + 2 X2 <=12 3 X2 >= 3 2 X1 >= 2