Question A4 (15 marks) An arrow-based PERT schedule shows a sequence of activities related to the construction of a small building project. Information on durations of activities and values of means, standard deviations and variances are given in this table. Critical path is 1-3. 3-5, 5-8. 8-10. What is the probability that this project will be completed in 32%% weeks? Acthan S 0.25 133 1.78 22 117 0.50 0.25 8 8 8 7-10 0.69 -to $-10 12.2 1.50 2.25