Two teenagers are walking home from school when two men armed with a gun approach them and demand their cell phones. The kids comply, but one of them has $5.00, which leads to one of the kids being punched in the face before the suspects flee with the $5.00. Upon conviction, the judge gives the lowest possible sentence plus the use of the gun. How many years should they receive?
a) 4
b) 7
c) 12
d) 15