A binary mixture of species a and b behaves as an ideal gas at 300K and 1bar. Calculate the partial molar Gibbs energy of species a,Ga, and the total solution Gibbs energy, g, at the following compositions. The pure species Gibbs energy for species a is 25kJ/mol and for species b is 40kJ/mol. (a) At ya=1 (b) At ya=0.5 (c) At "infinite dilution