Answers:
It's thriving for you if you sleep for 6-8 hours.
If you can't do that (for anything reasons) hold within mind that in rank to certainly be 'rested,' you own to sleep for at lowest possible 120 minutes (long ample for in the order of one REM cycle, which is what you requirement to hold when you sleep). That doesn't scrounging that it's respectable, though.
Its well again to sleep til you fluently rouse up but it would be great if you essentially woke up when you hold work or academy to walk to
It's well again if you own 8 hours of sleep and be recharged surrounded by the morning. Same entry if you're work the night-shift.