2. [30 pts] Consider a singly ionized helium plasma in equilibrium maintained at pressure 0.01 atm. Plot the dependence of ionization degree a vs. temperature. What is the temperature Too in [ev] corresponding to a = 90 %? At T = Too, estimate the percentage of electrons with kinetic energy higher than helium ionization energy of & = 24.58 eV. You can use Matlab, Wolfram, etc. to calculate integrals if needed