The companion website contains an example of a theoretical 1.0M⊙ main-sequence star produced by the stellar structure code StatStar, described in Appendix L. Using StatStar, build a second main-sequence star with a mass of 0.75M⊙ that has a homogeneous composition of X=0.7, Y=0.292, and Z=0.008. For these values, the model's luminosity and effective temperature are 0.189L⊙ and 3788.5 K, respectively. Compare the central temperatures, pressures, densities, and energy generation rates between the 1.0M⊙ and 0.75M⊙ models. Explain the differences in the central conditions of the two models.