Consider the AON graph of a project shown in Figure 19.18. Figure 19.18 The activity times are 3, 4, 2, 5, 7, 2, 2, and 3 days for activities A1 through A8, respectively. What is the earliest completion time of the project? Problem 1 Compute the EST, ECT, LST, LCT, and the slack time of all activities, and fill them in the table below. When you compute the EST and the ECT, assume the first activity starts at T = 0. When you compute the LST and the LCT, assume the target completion time is equal to the ECT of the last activity you computed. You can use the activity network as a tool to help you visualize the project. Activity EST ECT LST LCT Slack A1 A2 A3 A4 A5 A6 A7 A8 Problem 2 What is the critical path(s) and what is the completion time? Problem 3 Draw the Gantt chart of the project under the early start schedule.