The linear programming problem has an unusual characteristic. Select a graph of the solution region for the problem and describe the unusual characteristic. Find the minimum and maximum value of the objective function (if possible) and where it occurs.
?
z = x + y
?
Constraints:
?
x ? 0
y ? 0
-x + y? 0
-5x + y ? 5
?
A. 
Minimum at (0, 0): 0
Maximum at (-1,0): -1
B.
Minimum at (0, 0): 0
Maximum at (0, 1): 1
C.
Minimum at (-1, 0): -1
Maximum at (0, 0): 0
D.
Minimum at (0, 1): 1
Maximum at (0, 0): 0
E.
The feasible set is empty.
Answer: E
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