I have been going through my Textbook Database Systems: Design, Implementation & Management and I came across this Case 13. The case study is RC_Charter2 Company (located Chapter 4- pg #162-166). I would like to find out how this can be done in an easy and understandable way. I have to draw a ERD (Entity-relationship Diagram) diagram using Crow's foot Notation. I need to indicate Entities, Relationships, connections, cardinalities etc. and explanations for each of these. It must be clear enough to understand and why it was done like that.