We know you've got questions, and if you're brave enough to ask the world for answers, here's the outlet to do so. This week's Ask Engadget inquiry is from a pair of guys called Joe on opposite sides of the planet that both need a tablet-based solution for their higher education woes. If you're looking to send in an inquiry of your own, drop us a line at ask [at] engadget [dawt] com.Joe from New Zealand writes: I'm a second-year university student with a health issue that means I can't carry round heavy textbooks. I've been looking at tablets that I can use as a replacement for textbooks and paper notes. I think I need a tablet, pen and