While I did well enough, there were a couple questions that brought me back to my horrors in engineering school. Specifically, 'if you fold this, what touches

While I did well enough, there were a couple questions that brought me back to my horrors in engineering school. Specifically, 'if you fold this, what touches what.'. I'm completely incapable of doing this, and don't know why. I quit classes in my mech Eng course because they'd ask to take an abstract shape, transform it somehow, and draw it. I couldn't and it's probably the first time I'd felt helpless. Luckily I haven't needed that skill again, until now!