Thank you for using the site. I'll be happy to take a look at the problem set. Please post it as soon as you can.
I'm sorry to say that these problems are outside my scope of experience. These should be posted in the Business Homework category.
I could request that a moderator move this question, but given your one-hour time limit, I would suggest that you cancel this question and post a new one in the Business Homework category.
How do I cancel?
I don't know the precise details, since I don't know how the site looks on your end.
You can contact Customer Service for assistance. There should be a link on the page that you can use to request help.