Question 7 The following activity-on-arc project network diagram shows the activities, immediate predecessors and the activity duration (in days). A 1 3 B 4 J 1 14 21 H 10 5 8 8 5 7.1 Calculate the early and late event times for each activity in the network diagram. Your final answer must be shown on the network diagram. 7.2 Can Activity B be included on the critical path of the project? (9) (2) 7.3 By how many days can Activity C be delayed, assuming that the previous activities are com- pleted on time? (2) 7.4 Can Activity H be delayed if the previous activities are completed late and the following ac- tivities start early? 7.5 What is the expected duration of the project? (3) (1)