For a binary mixture of propanol (0.42 mol fraction) and water, what is the dew point pressure at 6.1 oC, if the vapour pressures of propanol and water are respectively 1.27 and 0.74 bar at that temperature? At this composition, the activity coefficients of propanol and water are 2.96 and 1.22, respectively, and the fugacity coefficients of propanol and water are 1.03 and 1.32, respectively. Report your answer with units of bar.