I guess we can give the answer since it's the next day...
WARNING...THERE IS MATH INVOLVED
Craig jumps 10 inches at a time. We assume he can only jump 10 inches, no more, no less.
Domenic jumps 6 inches at a time (no more, no less).
The total length is 144 inches out and 144 inches back.
On the run out, Craig has to jump 15 times (to 150 inches, or 6 inches more than necessary). Domenic jumps exactly 24 times and turns around.
Same thing on the return trip...but because Craig went that extra 6 inches, he is now behind and
DOMENIC WINS!!!