A computer network company installs network points. The project manager has been very concerned with the amount of time it took to complete several recent jobs. The data obtained (all in days) for a new contract are listed in the following table: Activity Immediate Predecessor Optimistic Time Most Probable Time Pessimistic Time A --------- 2 4 6 B --------- 5 6 7 C --------- 3 5 8 D A 2 3 5 E B, C 2 4 5 F C 6 9 11 G D, E 3 5 6 H F 1 2 4 I H 9 12 15 J G 6 8 9 K I. J 4 6 7 2.1 Calculate the expected time of activities for this project. Please note that all activity durations should be rounded off to the next whole number. (6 marks) 2.2 Determine the critical path for the project using slack. (14 marks)