Two particles of mass m are placed in a rectangular box of sides a>b>c in the lowest energy state of the system, compatible with the conditions that particles a

Two particles of mass m are placed in a rectangular box of sides a>b>c in the lowest energy state of the system, compatible with the conditions that particles are not identical. The particles interact with each other according to the potential V = Að (ri - T2). The energy of the system(1st order energy correction term only) is: