Remarks & Instructions: 1. Do not scale any coefficient or function. All coefficients must be numeric values. 2. Right-hand side of each constraint should be a nonnegative numeric value. 3. Do not put any spaces, extra characters or explanations since these may render your answer incorrect. 4. An empty box is considered incorrect and receives zero point. Suppose that x1,x2,...,x5 correspond to binary choices (or actions) with value 1 if an action is chosen and otherwise. Fill the boxes appropriately to model the following constraint: Either action 4 or action 5 should be selected but not both. x1 + x2 + x3 + X4 + x5