I have a few questions I'm hoping someone can provide some insight into.

First, is there any relation of the categories to a score range (I know I'm reaching here)? I scored at the low end of "excellent" for all categories except DS where I was at the high end of "above average."

Second, are the SC questions representative of what will be on the GMAT? Honestly, I seem to struggle on GMATPrep SC, but I did well on OG diagnostic SC. Hopefully this is a result of my studying, but it seems unlikely.

Lastly, the DS seemed overly tricky. DS is not my best area, but I would not think this is my worst, as suggested by OG diagnostic. My CAT prep tests suggest SC is my weakest, especially in GMATPrep.

Any advice would be great. I'm actually taking the GMAT on Saturday, so not much time left.