Work breakdown structure critical path aoa and aon networks

Question

Explore the Project scheduling with AOA and AON to arrive at critical path

PROJECT MANAGEMENT

Please help me with the following questions.

Problem- Work breakdown structure

Part 1- Critical path

Part 2- AOA and AON networks

Part 3- Forward and backward passes

Part 4- Variability in activity times

I need help to describe a step by step calculation guide on how to arrive at project schedule and identify critical path.