If a window is created using the following class, what value will zField hold after the button is pressed?

class Calc$($EasyFrame$)$:

$$ def $\_\_$init$\_\_($self$)$:

$$ EasyFrame.$\_\_$init$\_\_($self$,$ title $=$ "Number Field Demo", width $=300)$

$$ self.xField $=$ self.addIntegerField$($value $=2,$row $=0,$ column $=1)$

$$ self.yField $=$ self.addIntegerField$($value $=3,$row $=1,$ column $=1)$

$$ self.zField $=$ self.addIntegerField$($value $=0,$row $=2,$ column $=1,$ width $=8)$

$$ self.addButton$($text $=$ "Compute", row $=3,$ column $=0,$ columnspan $=2,$ command $=$ self.compute$)$

$$ def compute$($self$)$:

$$ num$1=$ self.xField.getNumber$()$

$$ num$2=$ self.yField.getNumber$()$

$$ num$3=$ num$1+$ num$2$

$$ self.zField.setNumber$($num$3)$