Question 4 (6 points) For the network below, calculate the early and late times, and the float/slack available on noncritical activities. a. Which activities make up the critical path? b. Assume that for all critical path tasks, the most optimistic completion time (To) is DU-3, and the most pessimistic completion time (Tp) is DU+5. (Assume that DU is also the most likely time Tm). i. Calculate the expected completion time (Te) for each critical path activity ii. What is the standard deviation of the expected completion time (Te) for each critical path activity at the 68% confidence level? ii. What is the standard deviation of the expected completion time for the entire critical path at the 95% confidence level? DU 15 DU 15 DU 10 ES EFS LF ES EF SUF ES EF LS LF DU 10 B DU 20 ES EF USUF ES EF 15 DU 20 ESEF 5 UF PC due