There are previous threads on this if you use the forum search button, I honestly don't understand why people have problems with the design project all you have to do is deck out an A3 diagram with consumer units, protective devices that will be used in the consumer units and cables showing what the consumer units will be feeding. They're just checking you know how to use the correct rated MCB/RCD/RCBO required for X type of circuit NB: Typically lighting will need a 6 amp RCD, socket outlets will need a 32 amp RCD.
All of the circuits that you'll need and where they will be situated is in the literature that you've been provided, so questions on this module often smack of "I can't be bothered to do my own homework, someone please do it for me!" That is not how you gain qualifications!