I have to do 6 credit points worth of maths each semester for both science and engineering. But the maths subjects are already fixed for my engineering course, whereas the science ones can be selected, I'm not planning to specialise in maths or anything, so I only want to do the ones relevant to my areas of interest. Could my maths credit points in engineering double up for my maths credit points in science, or do I still have to do 6 credit points of maths for EACH degree?