Develop the objective function and the necessary constraint equa¬

tions for the lockbox location problem given in Problem 1. Use the following variable definitions:

YA = a 0-1 integer variable indicating whether there is a lockbox open at location A (1 if there is, 0 if there is not).

YB = a 0-1 integer variable indicating whether there is a lockbox open at location B (1 if there is, 0 if there is not).