Question: Activity P on a project has exactly 4 predecessors A, B, C, and D whose early finish days are 20, 12, 38, and 32. (Here

Activity P on a project has exactly 4 predecessors A, B, C, and D whose early finish days are 20, 12, 38, and 32. (Here "day" means days after project start.) What is the early start day of P? Question 26 options: 13 38 39 21
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