Create the abstract use case for business manager of Amazon to find the top 10 popular items in search and purchase for the past week for a given region. Then, create the corresponding business use case.

Create the search/select(Add to shopping cart)/check out (purchase) abstract use cases for customer and use them to create corresponding business use cases.

List 10 different system requirements from the above business use cases. You can cluster them as an epic features if necessary and relate them to corresponding use cases. Make sure to sort them out from higher to lower priorities.