Based on the instructions: does my diagram match the use case description and fulfill the instructions especially the notation? If not what should I change?

Develop System Sequence Diagrams (SSDs) b. The SSDs must parallel the fully developed use case descriptions below. c. Use the complete notation. See the example below: 1. [true/false condition] return-value := message-name (parameter-list)

Please show how they should look as well

1. Order Management System:

Use Case Name: Manage Order

Triggering Event: Customer places an order or modifies/cancels an existing order

Actors: Customer, Sales Team, Warehouse Team, Shipping Team

Stakeholders: Order Management System Administrator

Pre-conditions:

Customer has an account with the Order Management System

Customer has selected products to order

Sales Team has verified and confirmed the order

Warehouse Team has packaged the order

Shipping Team is ready to ship the order\

Post-conditions:

Customer has received the order, or the order has been cancelled

Warehouse Team has processed the order for shipping

Shipping Team has shipped the order

Flow of Activities:

Customer places an order through the Order Management System

Sales Team reviews and confirms the order

Warehouse Team packages the order

Shipping Team ships the order

Customer checks order status through the Order Management System

If necessary, Customer modifies or cancels the order

Sales Team, Warehouse Team, and Shipping Team update the order status accordingly