2.70 Infant mortality Europe For Western Europe, the infant mortality rates reported by the Human Development Report 2006 were:

Sweden 3, Finland 3, Spain 3, Belgium 4, Denmark 4, France 4, Germany 4, Greece 4, Italy 4, Norway 4, Portugal 4, Netherlands 5, Switzerland 5, UK 5.

Show that Q1 = Q2 = Q3 = 4. (The quartiles, like the median, are less useful when the data are highly discrete.)