Consider a monoatomic gas at STP whose N particles are confined to move only over a 2D square (rather than a 3D cube). The spectrum of these particles are given by = 2ma ;(n /2 + n) where m is the mass of each particle and a is the side-length of the square. Here, nx, ny = 0, 1, 2,.... = What is Zsp? What is G(e), the number of energy levels between 0 and e?