Thermodynamics

Paragraph for next two questions
The entropy versus temperature plot for phases α and β at 1 bar pressure is given.
ST and S0 are entropies of the phases at temperatures T and 0K, respectively.The transition temperature for α to β phase change is 600K and Cp,β−Cp,α=1Jmol−1K−1. Assume (Cp,β−Cp,α) is independent of temperature in the range of 200 to 700K.Cp,α and Cp,β are heat capacities of α and β phases, respectively.