1. Develop a general equation for calculation of the activity coefficient In^2 = x1[A21 +2(A12 A21)x2] from the following equation A2121 + A12.22 X1x2RT 2. The following equation is a set of VLE data for the system of methanol(1)/watter(2) at 333.15 K (extracked from K. Kurihara et al., J. Chem. Eng.) /kPa X1 Y1 19.953 0.0000 0.0000 39.223 0.1686 0.5714 42.984 0.2167 0.6268 48.852 0.3039 0.6943 52.784 0.3681 0.7345 56.652 0.4461 0.7742 60.614 0.5282 0.8085 63.998 0.6044 0.8383 67.924 0.6804 0.8733 70.229 0.7255 0.8922 72.832 0.7776 0.9141 84.562 1.0000 1.0000 Find parameter values for the Margules equation that provide the best fit of G/RT to the data, and compare the value of P, y1 determined from the correlation with the experimental points