Identify properties of an object created by Object.create()

An object point is created by calling Object.create by passing an object proto to it, and then modified:

var proto = {x: 3, y: 2};

var point = Object.create(proto);

// change point
point.y = 4;  
point.z = 5; 

What would be printed if we attempt to log the properties of point and proto.y:

 console.log('x: '+point.x
             +', y: '+point.y
             +', z: '+point.z
             +', p_y: '+proto.y);