Fill in the blanks. 1. The constraint (x1+x2+x3+x4+x5=3) means that out of the projects must be selected 2. The constraint (x1+x2+x3+x4+x53) means that out of the projects must be selected. 4. If x1 is selected, then 2 must be selected to maintain the system. Logieal constraint: 5. There is no chance for x3 to be constructed unless you construct x5. Logical constraint: 6. If either project 1 or project 2 is seleeted, then project 5 cannot be selected. Which of the alternatives listed below correctly models this situation? A. x1+x2+x51 B. x1+x2+x51 C. x1x51,x2x51 D. x1+x51,x2+x51 7. In a "capital budgeting" problem, if either project 3 or project 4 is selected, then project 5 has to be selected. Which of the alternatives listed below correctly models this situation? A. x3+x4+x51 B. x3+x4+x52 C. x3x51,x4x51 D. x3x5,x4x5