A distillation column is fed (F=907.3[kg/h]) with an equimolar mixture of Toluene and Benzene. The feed temperature is 320K and the feed is located on the optimal stage. The pressure of the column is 1atm. In these conditions, the average relative volatility is 2.49. 80% of the benzene fed to the column is recovered in the distillate stream. The column produces a distillate (D) with 95\% purity (mole fraction). LP Steam (cost=15 \$/ton; Latent heat 2100 [kJ/kg]) is used to heat the reboiler. The actual reflux ratio is 1.5Rmin. lnPv(T)=AT+CBPv(T)[mmHg];T[K]Hev(T)=Hev(Tnqp)(1Tnbp/TC1T/TC)0.38 Calculate: 1 the minimum number of stages. 2 the feed condition parameter (q). 3 the actual number of stages. 4 the mass flow rate of bottom stream B[kg/h] 5 the molar flow rate [ kmol/h] of vapor in the rectifying section of the column. 6 the cost of LP steam (\$/year) assuming 8000h/y of operation. 7 the optimal feed stage