Creating a BPMN (Business Process Model and Notation) diagram requires a visual representation, which can't be directly rendered in this text format. However, I can describe how to create a BPMN diagram for the Library Book Borrowing Process step by step.
### Diagram Components
1. **Start Event**: Represented by a circle.
2. **Tasks**: Represented by rectangles (activities).
3. **Gateways**: Represented by diamonds (for decision points).
4.