Two Monoatomic Gases,helium and Neon,are Mixed in the Ratio of 2

Multiple Choice

Two monoatomic gases,helium and neon,are mixed in the ratio of 2 to 1 and are in thermal equilibrium at temperature T (the molar mass of neon = 5 $\times$ the molar mass of helium) .If the average kinetic energy of each helium atom is U,calculate the average energy of each neon atom.

A) U
B) 0.5U
C) 2U
D) 5U
E) U/5