Take a system that is composed of a single orbital, of which a fermion is able to occupy. This orbital can be occupied by either 1 or 0 fermion. If this orbital is to be unoccupied, then the system energy will be zero. When the orbital is occupied by the one fermion, the energy of the system will be e. This orbital will not allow any other occupancy. Determine the system's mean square deviationas a function ofN.