5 for each team. Or until a winner is determined.
Four. They were Ukraine v Switzerland, Germany v Argentina, Portugal v England and Italy v France.
14. 3 were missed (by Ronaldo, Terry and Anelka), and Man Utd won the shootout 6-5.
Because there is more pressure on the referees from the media and managers
The penalty spot is 15cm wide with its centre 6.4 metres from the centre of the goalline; the ball can be placed anywhere on that spot when the stroke is taken.