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After our first PT, should we be drilling our weakest sections until we get all of the questions on the "hard" setting correct, within the time frame? Or is 4/5 good enough to move on. I'm not sure how many drill rounds per section I should be doing, so that I don't waste clean practice questions but that I also understand how to better approach the sections...
For the 4th problem, I essentially flipped the things being compared and the quality by which they are being compared. I put the two things being compared as more sophisticated instruments versus what is currently available, and they are being compared on which is required to detect planets outside our solar system better. Does this still work?