Economics Cambridge Girton College Interview

Hi, I am thinking of applying to Girton for economics. For anyone who has had an interview for econ at Girton, roughly what is the interview like? I've seen they give you a text to read beforehand which I presume is discussed in the interview and that they ask you a section of your personal statement, however what are the maths questions like? Are they more game theory based, probability based or is it questions based on solving problems involving economic modelling with graphs?