For me, I like to picture the cube as two squares with arms connecting them. I count up the corners on one square and multiply that by two. Since there are four corners on one square the equation you get is 4*2=8. So, your answer is 8.
IF I could go back in time and give my younger self some advice on how to be a better student, be more successful in school, life, etc, I would definitely tell myself that being involved in everything comes at a cost. It is better to find a few things that
you like to do, do them well and often, than feeling stressed because there is so much on your plate at one time. Being a 'Jack of all Trades'...