1. By using three estimates for each activity, find: 1.1. Estimated time te 1.2. Activity standard deviation s 2. Draw PERT network after calculating the events estimated times and standard deviations.

Activity Dependency Optimistic Most likely Pessimistic CI 6 ON 8 5 3 B - 4 5 | A 2 3 4 D B X-1 x+2 x = (last digit of your roll no. +4) 3 E B 1 4 F 18 10 15 2 3 3 4 G H H EF CD 2 2 2.5