The binary liquid of nitromethane and n-nonane exhibits liquid-liquid equilibrium, LLE. At 90C, one phase has a nitromethane mole fraction of 0.214 and the other phase has a n-nonane mole fraction of 0.0469. Compute the vapor-liquid-liquid equilibrium VLLE for this system at 90C. 1. Is the one-parameter Margules equation valid for LLE according to the data given? 2. If Margules one-parameter is not appropriate, use the Van Laar equation. Use the given data to estimate the two parameters. 3. Calculate P* and y* at the 3-phase equilibrium condition. 4. Calculate and graph the complete phase diagram P-X-y