Question: 4. Let X, X,, and X, be 0 - 1 variables whose values indicate whether the projects are not done or are done. Which answer

4. Let X, X,, and X, be 0 - 1 variables whose values indicate whether the projects are not done or are done. Which answer below indicates that at most two of the projects must be done? a. X + X, +X, = 2 b. X, + X, +X, 32 c. X + X2 +X, > 2 d. X, + X, -X, = 1 2 5. Let X, and X, be 0 - 1 variables whose values indicate whether projects 1 and 2 are not done or are done. Which answer below indicates that project 2 can be done only if project 1 is done? a. X+ X 1 b. X + X2 = 2 c. X-X, 30 d. X - X20 0. In a multiple channel system (i.e., M/M/K), a. each server has its own queue. b. each server has the same service rate. c. u K

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