A project has estimated optimistic (a), most likely (m) and pessimistic (b) times for activity D as 7, 8 and 14 days, respectively. What is the mean AND variance for activity D, respectively (to 1 decimal place): Select one: a. 8.8 and 1.2 b. 8.5 and 0.7 C. 8.8 and 0.7 d. 9.7 and 1.4

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