ALEKS Online Math Question

I'm currently taking ALEKS online and I just finished my first placement assessment with a 79, so I have a few questions:

• Does each test matter, or is it only the last test? I've heard people scoring well (high 80s/90) on their 2nd and 3rd attempt and not having to take the 3rd/4th assessment, so I'm not sure how it works. At SOAR I heard that as long as you score a 90 on 1 of the 4 you're good, but I've also heard that you need to do the last test regardless of previous scores
• Are they (CSULB) able to tell I logged on with another computer/from a different location? I was planning on going to a friends house and working on it with him, but I'm not sure if they see/if they care.
• There's a requirement of 5 hours spent in the learning module, but can I just keep the page open/move my mouse around every now and then to get through the 5 hours? Or do I actually have to do the activities given?

Thanks in advance for the feedback