A1. The following data have been obtained for liquid Cr-Ti mixture at 1250 C. Xer 0.09 0.27 0.19 0.532 0.37 0.778 0.47 0.820 0.67 0.863 0.78 0.863 0.89 0.906 dcr 0.302 0.660 (a) (b) (c) Plot the activity coefficient of Ti and Cr versus composition. Plot the activity of Ti and Cr versus composition. Plot the integral Gibbs free energy (AGM) for the mixture