You need to design the checkout system for an e$-$commerce platform. The system should handle adding items to a cart, processing payments, and placing orders.

Analyze points below by referring to course materials:

How would you design the cart management system? $(8$points$)$

How would you handle payment processing securely$?$

$(4$points$)$

How would you ensure that the order is placed reliably even if some components fail?

$(4$points$)$

How would you handle scalability during peak shopping times like Black Friday?

$(4$points$)$