Table 11-2 The following represents a project with four activities. All times are in weeks. Activity Immediate Predecessor Optimistic Time Most Likely Time 8 Pessimistic Time t... 8 1:21 A B D 2 8 6 5 14 8 18 17 A B 9 11 According to Table 11-2, there are four activities in the project. Assume the normal distribution is appropriate to use to determine the probability of finishing by a particular time. If you wished to find the probability of finishing the project in 20 weeks or fewer, it would be necessary to find the variance and then the standard deviation to be used with the normal distribution. What variance would be used? Select one: o a. 2 2: 22 23 24 25 26 27 28 29 30 31 32 33 34 35 O b.4 c. 8 d. 12 O e. None of these