6) All units in weeks

Activity Predecessor Optimistic Most likely Pessimistic

Time Time Time

A S 3 4 5

B T 2 2 2

D A 1 5 9

M U 3 5 7

O B 1 2 9

P D, M, Y 8 10 12

R T 5 6 10

S T 1 2 3

T -- 4 4 4

U R 1 1 1

Y O 5 10 15

1. What is the critical path and expected completion date if you start this project on October 1st 2018?

2. What is the probability that you will finish this project 2 weeks earlier than your expected time?

Please answer both questions. Show work for understanding. Thank you !