Given the following network and activity time estimates, determine earliest and latest activity times, slack, the expected project completion time and variance and the probability that the project will be completed in 28 days or less. (10 pts) Time Estimates (Days) Activity Predecessor(s) a m B A - 5 8 17 B - 7 10 13 C A 3 5 7 D A 1 3 5 E B, C 4 6 8 F B, C 3 3 3 G E 3 4 5 Please complete the following table Activity Expected time Variance ES EF LS LF Slack A B C D E F G What is the probability that the project will be completed in 28 days or less?