There is a project involving nine activities. The time required for the completion of the activities and the priorities of the activities are given below. Activities ABCDEFGHI D Time required (weeks) 3 42653758 Start priority AAYOOEE B.C EF D.G.H Questions; a) Draw the network (arrow) diagram of the project. b) Find the earliest start and end time for each activity. c) Determine the earliest time the project can be completed by identifying the critical path of the project. d) Determine the latest start and end times for each activity. e) Identify critical and non-critical activities in the project and explain how long delays are permissible for which activities.