Construct a project network diagram (activity on arc) to represent the durations and interdependencies of activities that must be completed during the project (excluding dummy activities).

A landscaping company is redesigning a front garden. The table below shows the activities required, their durations, and the activities that must be completed immediately before each activity can start. Construct a network diagram to show the sequence of activities from start to finish, labelling all activities and durations. Use forward and backward scanning to show the earliest starting time (EST) and latest starting time (LST) for each activity node.