Another possibiity
71,71,73,73,79,79,79 [ the spread is stil 8 ]
And yet another [ that Melody found ]
71, 72, 72, 73, 79,79,79 [ the spread is still 8 ]
Note that 79 must appear no less than 3 times......if it only appeared 2 times....then this would set up a situation where either 72 or 73 would have to be the mode, which is impossible