please finish this with all the steps

Problem 2: Basic Vapour/Liquid Equilibrium Problem The activity coefficients for a solution of water (1) and acetic acid (2) are given by the Margules equation, where A12=1.705 and A21=0.9439. The vapour phase is an ideal gas mixture and the liquid phase is a non-ideal solution. a) Calculate the pressure if the bubble point is 100C for a solution with x1=0.63. b) Calculate the pressure if the dew point is 100C, and the vapour has a composition of yl= 0.63 Use the following form of the Antoine equation: ln(P5xt)=AT+CB where T is in K and Part is in mm of Hg