$1.$ Based on the initial draft project estimates $($See Exhibit $3)$ developed by Niranjan Raj, construct a project network diagram using the activity$-$on$-$node $($AON$)$ representation. A project network diagram is a visual representation of a project with all its activities, their relationships, and estimated times.

$1.$ Detail the basic rules for constructing an Activity$-$On$-$Network $($AON$)$ network diagram.

$2.$ Construct an AON network diagram using the case information and the data provided in case Exhibit $3$

$3.$ What is the estimated completion time of the project as per initial draft estimates? $($See Exhibit $3)$