Log Book 101

[jo57]

I have a couple of log book questions I that I am not sure of. Maybe someone can help?
1.) On the 70hr/8day rule. Can a driver work indefinitely as long as he/she does not go over 70 hrs?
2.) What exactly is a split sleeper berth entry and can a solo driver use it and when?
3.) Can a driver work over the 14 hr limit without driving?

Thanks guys. I know this is probably really easy for most of you, but I haven't figured them out yet.