I’m guessing it wants you to fill in two major key signatures like D major and C major also with two minor key signatures like A minor and B minor. I picked those key signatures because A minor is the same as C major but it starts on A and D major and B minor is the same but it starts on B
Honestly i dont think its a matter of how fast you play, but HOW you play, kick butt dude, when you feel satisfied with yourself then you're a rock hard shredder