Let x1, x2, and x3 be 0 - 1 variables whose values indicate whether the projects...

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Let x1, x2, and x3 be 0 - 1 variables whose values indicate whether the projects are not done (0) or are done (1). Which answer below indicates that at least two of the projects must be done? Ox1 x2 = 0 Ox1 + x2 + x3 = 2 Ox1 + x2 + x3 2 Ox1 + x2 + x3 2 Let x1, x2, and x3 be 0 - 1 variables whose values indicate whether the projects are not done (0) or are done (1). Which answer below indicates that at least two of the projects must be done? Ox1 x2 = 0 Ox1 + x2 + x3 = 2 Ox1 + x2 + x3 2 Ox1 + x2 + x3 2