1. From the sensitivity report ( Excel) for the variable cells below:

		Final	Reduced	Objective	Allowable	Allowable
Cell	Name	Value	Cost	Coefficient	Increase	Decrease
	A	9	0	5	1E+30	1.25
	B	0	-2	6	2	1E+30
	C	0	-2	1	2	1E+30

1. Which decision variable (s) does appear in the optimal answer ? How many units ?

2. How much is the optimal solution ( objection function value) ?

3. What is the range of objective function coefficient so that the optimal answer remains as mentioned above ?

4. Which decision variable(s) is not used in the optimal answer ? and interpret !