The activity (r) is a function of the fraction composition (x) for a binary mixture. Estimate the parameters (A and B) using the following activity model and experimental data In (r) (1-x) [A + 2(B - A) x] The initial values for A and B are both 1.0. In(r) X 0.1686 0.4533 0.3039 0.2775 0.3681 0.2172 0.6044 0.0487 0.7255 0.0210 0.7776 0.0122 2. (33 Points) Compute the following equation and plot y as a function of x y = 5 e-*dx 0 x2 3.(34 Points) Calculate the volume work for 10 kg gas. The system is expanded at 75 C from 1 m to 4 m. The parameters for vd W equations: a = 188.6375 Pa (m/kg), b-0.00097298 m/kg. P= RT a v2 v-b