Analysis of entries

Thanks for your help on this.

We are nearly ready to release this quiz but would like some analytics.
What we'd like is
a) number of entries per day/week per country (in a graph)
b) country with highest number of correct answers per day / week (in a graph)
c) users/email addresses with the highest number of correct answers per day / week (in a graph)

I cannot seem to get the date working correctly (i.e. to set the date they entered the quiz) at http://creator.zoho.com/faheyr/sap-quiz/

Thanks