Consider the following graphical LP model where the objective function is to minimize X7 a) Fill in the blanks using the numbers 1. 2. 3, and 4 for the correct constraints. For incorrect constraints, write NA. Xy 560 10X, 560 X2 X-X220 2X2 580 D 6X4X220 C 4X1 + 4X22 16 H X4 - Xy 50 10X, 10X, 250 B A 10X, 240 F Xy + X2 50 E 2 5X1 +5X250 4 5 X1 60X140X, 50 b) Fill in the blank using the correct feasible region A B C D E F G Hor). c) Is Constraint 4 in the graph binding or non-binding