Display the name, the age, the sex and the professional
category of the "Leader" of the group : the one which
collects the maximum of affinity in descending order. The first
of the list is the "leader" of the group.
Display, for the leader, the score that he obtained
and the distribution by sex. This question can be useful, for example,
to check the "weight" of the variable Sexe in the score
obtained by the leader.