help thermo, with steps please! (previous answer is incorrect)

2. Your supervisor has assigned you to obtain parameters A and B for the three-suffix Margules equation to input in the company's phase equilibrium computer database. The binary mixture of interest is benzene (a) in 1-propanol (6) at 75C. You cannot find any values in the literature for the three-suffix Margules equation, but you do find the following values from the van Laar (VL) equation: J J Az = 3000 and B2 = 5040 mol mol (a) Use these values to estimate the three-suffix Margules equation parameters A and B. (b) Calculate the fugacity of benzene in the liquid, fo, in a mixture of 30 mole% benzene at 75C and 81 kPa. (c) If this liquid mixture is in equilibrium with its vapor, what is the mole fraction of benzene in the vapor