Colton is a tour guide who Gives several tours over the
course of a morning shift and an
evening shift. His morning shift
tours are given to groups of 10
people while his evening shift
tours are given to groups of 5
people. If the total number of
tourists in the morning shift is
the same as the total number of
tourists in the evening shift,
what is the minimum number of
tourists that Colton guides in
each shift?