Where is the center of the mass

Two particles of masses m1 and m2 (m1 a) less than 5 meters from the particle of mass
b) exactly 5 meters from the particle of mass
c) more than 5 meters but less than 10 meters from the particle of mass
d) more than 10 meters from the particle of mass

it would be closer to the heavier one, m2

None of your answers make sense, as they just say "particle of mass" which could apply to either end.