The following table gives the details of 12 activities in a project. Activity Predecessor(s) Duration (days) A B C D E F G H I J K L A A B.C D D D G F.H I I K 1 3 1 1 1 3 3 1 1.5 1 3 2 (a) Construct the project network and label the nodes with suitable numbers. (10 marks) (b) Find the critical path of the project network by computing the earliest time and the latest time for each event. (10 marks)