757 avionics

some questions if anyone knows the answers...

is 757 fly by wire or fly by cable?

The FMCS has full flight and landing capability, is it a separate control 
system?

The FANS network, is it capable of directing "goto location/altitude" and 
"set airspeed to K" type commands to the plane?

Is the yoke and throttle a completely separate control system from the 
FMCS control system or are they common?

is the throttle control in cockpit only routed through FMCS ?

I read that the yoke was capable of exerting more power on the surfaces 
than the FMCS could, essentially giving yoke priority, is that correct?  
If so can you describe how that works?