I have a 2009 Murano and I’m curious about how the AWD works.

1. I assume the car does not do any type of torque vectoring. What percentage of power is delivered to the front and rear tires?
2. Is it possible for all four tires to spin in snow or mud? Is that what the AWD lock button is for?
3. Around what speed will the AWD lock turn itself off?
4. Any other information about AWD you want to share?

THANKS.