At 90 oC, the vapor pressures of benzene and toluene are, respectively, 1010 and 405 mm Hg. Calculate the vapor pressure of a solution of 20 g of benzene (C6H6) and 20 g of toluene (C7H8) at 90 oC. Is the boiling point of this mixture higher or lower than 90 oC at an atmospheric pressure of 1 atm? Show your work for full credit.