5. Draw the project network for the following activities in a project. [15 M] a. Determine the expected project completion time and the critical path of the project. b. Determine the variance of the expected project completion time. c. What is the probability that the project will be completed on or before 104 weeks? A B C (From Standard normal distribution table, P (0.41) = 0.34090; P (0.42) = 0.33724; P (0.17)=0.33360) Activity D E F G H I J Predecessor A A B B,C B D,E F,G B,C I.H Optimistic time (weeks) Most likely time (weeks) 4 10 7 13 19 4 13 13 16 19 16 13 19 22 19 25 35 7 13 Pessimistic time (weeks) 28 25 37 37 33 33 19 49 37 19