[tex]\bf 1\rule[0.35em]{2em}{0.25pt}\boxed{1.5}\rule[0.35em]{2em}{0.25pt}2\rule[0.35em]{4em}{0.25pt}3\rule[0.35em]{4em}{0.25pt}4\rule[0.35em]{4em}{0.25pt}5\rule[0.35em]{4em}{0.25pt}6\rule[0.35em]{3em}{0.25pt}\boxed{6.7}[/tex]
so, from 2 to 6, is 4 units.
from 1.5 to 2, is 0.5 units.
from 6 to 6.7, is 0.7 units.
4 + 0.5 + 0.7 => 4 + 1.2 => 5.2.
