i am working on this practice i don't know if I'm reading these wrong but here is what I have so far

1. 3 out of 5

2. max of 3 out of 5

3. is this one min of 3 out of 5

4, X1=X2

5. X5<=X3

6. is it C. x1 - x5 1, x2 - x5 1

7. Is it B. x3 + x4 + x5 2

< Practice Questions> 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 + x5 <= 3) means that ________ out of the ________ projects must be selected. 3. The constraint (x1 + x2 + x3 + x4 + x5 >= 3) means that ________ out of the ________ projects must be selected. 4. If x1 is selected, then x2 must be selected to maintain the system. Logical constraint: _______X1=X2_________ 5. There is no chance for x3 to be constructed unless you construct x5. Logical constraint: _________X5<=X3_______ 6. If either project 1 or project 2 is selected, then project 5 cannot be selected. Which of the alternatives listed below correctly models this situation? A . x1 + x2 + x5 1 B. x1 + x2 + x5 1 C. x1 - x5 1, x2 - x5 1 D. x1 + x5 1, x2 + x5 1 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 + x5 1 B. x3 + x4 + x5 2 C. x3 - x5 1, x4 - x5 1 D. x3 x5, x4 x5