Given the optimal solution: X* = 3 and Y* = 7 for the following Linear Programming problem with 4 constraints:
MAX 2X + 3Y
s.t. 2X + Y ≥ 4 .......... (1)
X + Y ≤ 10 .......... (2)
X + 3Y ≤ 24 .......... (3)
2X + Y ≤ 16 .......... (4) X, Y ≥ 0
Which one of the following statements about dual price of constraint 3 is correct?
Select one:
a. dual price of constraint 3 must be zero.
b. due price of constraint 3 must be not equal to zero.