How to peer-review a conference "Symposium"

I have to do a review of a "symposium" that will take place in a major conference in the business / management field. The document I recieved for review consists of:

• Abstract + Overview of the symposium


• Proposed format of the symposium


• Relevance to divisions


• 5 Article summaries, each about 4-5 pages long

I couldn't find any specific information how to do a peer review of a symposium and I only reviewed regular articles before.

My questions is: how should I review this symposium document? Do I need a separate review for each article summary? Do I need to comment on the information prior to the article summaries, i.e. overview of symposium etc.?