Question: 1. Consider two decisions A and B represented by two binary decision variables XA and Xb, each of which takes 1 if the decision is

1. Consider two decisions A and B represented by

1. Consider two decisions A and B represented by two binary decision variables XA and Xb, each of which takes 1 if the decision is made to choose it, and 0 otherwise. Select an appropriate expression for the constraint in each question. 1 X + XB = 0 (5) XA + XB = 1 2 XA - XB = 0 XA + XB 0 7 X + XB > 1 XA - XB > 0 XA +XB = 2 (a) Both A and B should be always chosen. (b) At least one of the decisions A and B should be chosen; and both can be chosen together. (c) At least one of the decisions A and B should be chosen; and both should not be chosen together. (d) Each of the decisions A and B can be chosen individually; and both should not be chosen together. (e) B can be chosen when A is chosen; but A should be chosen when B is chosen

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