Atwo dimensional ideal bose gas: n bosons of spin oland mass : / moving in a region of are. a with. n,a-→o , and finite concentration nan/a.ヤ the gas is in equilibrium at temperature t. (a) whát is the energy density of single-particle states? (b) calculate u as à function of temperature t, (hint: the relevant integral can be simplified with substitution x-exp(-e/kt) (ans. 2makt