Transforming one interface into another

In the example, there is a type Bar that implements methods X(), Y(), and Z(). Based on these, two interfaces are declared: XY, requiring methods X() and Y(), and YZ, requiring methods Y() and Z(). Question: can a variable of type XY be cast to type YZ?

type Bar struct{}

func (b *Bar) X() {}
func (b *Bar) Y() {}
func (b *Bar) Z() {}

type XY interface {
 X()
 Y()
}

type YZ interface {
 Y()
 Z()
}

func main() {
 var b XY = &Bar{}
 z := b.(YZ) // Will this cast work?
 z.X()       // And this call?
 _ = z
}

Describe how interface casting works in Go, what conditions must be met, and what will happen if you try to call a method that is not present in the target interface.